Friday

September 19, 2014

September 19, 2014

Posted by **Mayank** on Monday, July 16, 2012 at 2:33am.

3x + 7y + 5= 0

4x - 3y - 8 = 0

Find p; if:

px + y - 1= 0

- Math -
**CHIMA**, Monday, July 16, 2012 at 4:17am3X+7Y+5=0.,..,..,.,..(1)

4X-3Y-8=0..,,..,.,...,..(2)

From (1) x=(-5-7y)/3..,..,..(3) put into equ (2) for x ; (-20-28y)/3-8=0 ; y=31/28=1.1 put into equ 3 for y

x=(-5-7.7)/3=-4.2

-4.2p +1.1-1=0 ; p=-0.1/-4.2

p=0.024

- Correction - Math -
**Reiny**, Monday, July 16, 2012 at 9:11amfirst times 3 ---> 9x + 21y = -15

2nd times 7 ---> 28x - 21y = 56

add them

37x = 41

x = 41/37

sub into 1st:

3(41/37) + 7y = -5

7y = -5 - 123/37 = -308/37

y = -44/37

then if px + y = 1

p(41/37) - 44/37 = 1

p = (1 + 44/37)(37/41) =**81/41**

I verified the above answers, they satisfy the original equations.

- Math -
**Ama**, Monday, February 25, 2013 at 4:31am37-32-2-47-81

**Answer this Question**

**Related Questions**

MATH PLEASEEEEE - I have a question, if f(x)=x/2 and g(x)=3x+1 find: a) (f+g)(x...

Calculus - Let h(x)= x^3 + 4x -2. Let g(x) represent the inverse of h(x). Find g...

(Math)Literal Equations and Formulas HELP! - 1) Solve for p. 3(p+q)=p (1point) Q...

math - solve each equation for 0=/<x=/<2pi sin^2x + 5sinx + 6 = 0? how do ...

Math help please - 1. Solve for x. 4(x - b) = x b = 4/3x b = 3/4x x = 4/3b x = 3...

math - how would I solve 10=7-m? I dont understand how to find the variable and ...

Math - We have an important chemsitry test due and I want to make sure that I do...

English - 1. He can not solve the math problem. 2. He cannot solve the math ...

Math - Solve the system by addition or substitution. 3x – 4y = 8 6x – 2y = 10 ...

math - I'm struggling with this problem and can't find a good example in my book...