Question

3x + 2y = A
5x + y = B
Eliminating the variable y from the system of equations results in -7x =

Answer 1

Answer:

  A-2B

Step-by-step explanation:

Multiply the second equation by -2 and add the first equation.

  -2(5x +y) +(3x +2y) = -2(B) +(A)

  -10x -2y +3x +2y = -2B +A . . . . . . eliminate parentheses

  -7x = A -2B . . . . . . . collect terms