Question

2x - y=17 and x-y=10
Solve with substitution, show work?

Answer 1

x = 7 y = -3

Explanation:

x - y = 10 ⇒ x = 10 + y

Substitute x = 10 + y into 2x - y = 17:

2(10 + y) - y = 17

20 + 2y - y = 17

y = -3

Substitute the found value of y into x = 10 + y to find x:

x = 10 - 3 = 7