algebra

posted by .

if you have the sign of > or < does this also mean = ???? so confused
my problem is -3x+2y=7
x+4y=-7
how do I do this? please help

No. The sign < or> does not include equal. On computers we often just do this => for equal or greater than. or this: >=.

In texts, it is often this way: ≥



Your problem. Multiply the second equation by 3, then add the equations.
-3x+2y=7
3x+12y=-21

adding...
0x +14y=-14
solve for y, then go back substuting in y, and solve for x.


Your problem. Multiply the second equation by 3, then add the equations.
-3x+2y=7
3x+12y=-21

adding...
0x +14y=-14
solve for y, then go back substuting in y, and solve for x.


thank you for your help it is very helpful to me.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Math

    Find the integrals. (show steps) (integral sign) xe^(4x^2) I think this how is how its done: (integral sign) xe^(4x^2) it's a u du problem let u=4x^2 so, du=8x dx now you have an x already so all u need is 8 inside and and 1/8 outside …
  2. math

    Can somebody please help me with this problem?
  3. algebra

    Graph the system of inequalities x (lesser or equal to sign)2 y (greater or equal to sign)-2x+4 I am having trouble understanding what points to plot on the graph and also how the graph should be shaded (if at all).
  4. Algebra

    find the indicated sum not sure how to type the sigma sign, but here is the problem 6 on top of the sigma sign. under the sigma sign is i=3 and on the right side of the sigma sign (3i-2)
  5. Math (Algebra)

    Solve using the multiplication principle -7x <_ 35 the sign is an inequality equal greater or lesser than sign would I substitute the sign for an equal sign and then divide 35 by -7 x=-5 -7 x -5= 35 how would I write the solution …
  6. Algebra

    Hi. I have an answer for this and just need to confirm it. 2x+5(less than or equal to sign here)x + 6. I minused the x's on both sides of the greater then equal to sign; x +5 (greater then or equal to sign) = 6; x +5-5 (the sign here) …
  7. pre-algebra

    Use an inequality to solve the problem. A shopkeeper is making a triangular sign for his store front, but he must keep the sign under 20 square feet to adhere to the zoning laws. If the base of the sign is 20 feet, what is the maximum …
  8. MATH

    Reiny (Previous problem) better form would be to place the equal sign in front of each new line You also have errors -3(x + 3)- 2(x + 4) = -3x - 9 - 2x - 8 = -3x - 2x - 9 - 8 = -5x - 17 So -3 x 3 made -9. how did the 2 become negative, …
  9. algebra

    Could you pls tell me why I have to change this sign. You should look at the sign like an equal sign. -2/5x -9 < 9/10 -2/5x < 99/10 x < -24.75 Why is this wrong?
  10. algebra

    Could you pls tell me why I have to change this sign. You should look at the sign like an equal sign. -2/5x -9 < 9/10 -2/5x < 99/10 x < -24.75 Why is this wrong?

More Similar Questions