Answer:
x = 2
y = 5
Step-by-step explanation:
Rewrite x + y = 7 to make y the subject:
⇒ y = 7 - x
Substitute y = 7 - x into 2x - y = -1 and solve for x:
⇒ 2x - (7 - x) = -1
⇒ 2x - 7 + x = -1
⇒ 3x = 6
⇒ x = 2
Now substitute x = 2 into one of the equations and solve for y:
⇒2 + y = 7
⇒ y = 5
