Question

check:
2x + y = 5
x − 2y = 10

Answer 1

y = 5 − 2x
x − 2(5 − 2x) = 10
x − 10 + 4x = 10
5x − 10 = 10
5x = 20
x = 4

2(4) + y = 5
y = −3

Is my work correct?

Answer 2

right :)

Answer 3

Thank you :)