Question

A: 5x - 2y = 10

B: 4x + 3y = 7
To solve this system of equations by elimination, what could you multiply each equation by to cancel out the y-variable?
A) Multiply A by 3 and B by 2
B) Multiply A by 4 and B by 5
C) Multiply A by 3 and B by -2
D) Multiply A by 4 and B by -5

Answer 1

A.) multiply A by 3 and B by 2.
Hope this helps you.

Answer 2

5x - 2y = 10.....multiply by 3
4x + 3y = 7.....multiply by 2
----------------
15x - 6y = 30 (result of multiplying by 3)
8x + 6y = 14 (result of multiplying by 2)
-----------------add
23x = 44.....u see how the y was eliminated ?

answer is A