Question

Solve the system of linear equations by substitution. 2x=y−10 x+7=y

Answer 1

(-3, 4)

Explanation:

2x = y - 10 (y = x +7) so

2x = x +7 - 10

2x = x -3

x = -3

-3 + 7 = y

4 = y

Answer 2

Explanation:

2x = y - 10 and x + 7 = y.

By Substitution,

2x = (x + 7) - 10.

=> 2x = x - 3, x = -3.

Therefore y = (-3) + 7 = 4.

The pair of solutions are x = -3, y = 4.