Answer:
(3, -4)
Step-by-step explanation:
To solve the system of equations by substitution, start by labelling the 2 given information.
y = x - 7 -----(1)
5x + 2y = 7 -----(2)
Substitute (1) into (2):
5x + 2(x - 7) = 7
Expand:
5x + 2x - 14= 7
7x = 14 + 7
7x = 21
Divide both sides by 7:
x = 21 ÷ 7
x = 3
Substitute into (1):
y = 3 - 7
y = -4
Thus, the solution to the equations is (3 , -4).
For a similar question on solving by substitution, check out: https://brainly.com/question/14830701
