Maths

you have to solve the following by finding the value of x and y. can u help please?

x+3(x+1)=2x

1+3(x-1)=4

2x-2(x+1)=5x

2(3x-1)=3(x-1)

4(y-1)+3(y+2)=5(y-4)

3y+7+3(y-1)=2(2y+6)

These are exercises in standard algebraic manipulation of equations. Basically, you (1) multiply out terms in parentheses; (2) combine "like" terms and (3) then add to, subtract from, multiply or divide both sides of the equation until you get the unknown (x or y) on one side. Here is one way to do the first of them:

x+3(x+1)=2x
(Multiply out the parentheses)
x + 3x + 3 = 2x
(Combine terms in x)
4x + 3 = 2x
(Subract 2x +3 from both sides)
2x = -3
(Divide both sides by 2)
x = -3/2

Now you try the others. If cannot follow these steps, you should consider a private tutor before you fall too far behind in class.

thanx

  1. 👍 0
  2. 👎 0
  3. 👁 182

Respond to this Question

First Name

Your Response

Similar Questions

  1. math 108 trig

    1.Solve, finding all solutions in [0, 2π). cosx sin2x + sinx cosx - sinx = 0 2.Solve, finding all solutions in [0, 2π). 3sec x = 2tan^2x

    asked by brittney on March 6, 2016
  2. Math

    I have to solve the equation by finding a common base. 9^(x2-1)= 1/27^x Do i cross multiply and solve for x?

    asked by kim on February 4, 2012
  3. polynomials and zeros

    5x^2 + 4x - 2 = 0 How would you solve this by graphing? Do you just draw a graph by finding x and y? The answer is -(2-sqrt14)/5, -(2+sqrt14)/5 There's no way you can just graph it and come up with these numbers by finding the

    asked by jack on June 27, 2017
  4. Math

    This question was answered but not by finding a range? If Jim and Mary jog 12 miles in a week. Is it reasonable that the jog 624 miles in a year. To solve problem need to estimate by finding a range.

    asked by Pat on January 7, 2013
  5. Math

    This question was answered but not by finding a range? If Jim and Mary jog 12 miles in a week. Is it reasonable that the jog 624 miles in a year. To solve problem need to estimate by finding a range.

    asked by Pat on January 7, 2013
  6. Math (Slope and Concavity of vector)

    I am given a vector function (in other words) : (2cos(t) + cos(2t))i + (2sin(t) + sin(2t)j + 0k Compute the slope dy/dx and concavity d^2x/(dx^2) at t = pi/3. I understand that finding the slope of a vector is possible by using

    asked by Ray on November 12, 2017
  7. college chemistry - molarity question

    My textbook doesn't show me how to do problems like the following, and I'm having a hard time finding similar problems online. Most of the molarity problems I'm finding involve mixing a substance with water, but these involve

    asked by lholmq on April 29, 2009
  8. Calculus

    Let h(x)= x^3 + 4x -2. Let g(x) represent the inverse of h(x). Find g(14). I know that if (a, f(a)) is on h(x), then (f(a), a) will be on g(x). I also know that if f^-1(a)=b if f(b)=a. I thought that if I could find the x value(s)

    asked by Kelly on March 31, 2009
  9. College Finite Math

    Suppose for this problem that Pr[E]=13/24 and Pr[F]=5/8 and Pr[(E U F)'] = 0. Finding Pr[E/F] and Pr[F/E]. For this problem I added 13/24 + 5/8 and got 1.17, therefore, I assumed that .17 is the intersection between Pr(E) and

    asked by Rory on March 16, 2009
  10. math

    solve the equations by finding the exact solution 3=x-3

    asked by Andrzej on February 10, 2013
  11. Algebra 2

    How do I solve this using the Quadratic formula and finding the determinant? 1. 5x-6=0 2. x+25=0

    asked by Jessica on November 12, 2014

More Similar Questions