Answer:
Step-by-step explanation:
2y - x = - 7 ------------(I)
⇒ 2y = -7 + x ---------(II)
x + 2y = 3 ------------(III)
Substitute 2y = -7 + x in equation (III)
x + (-7 + x ) = 3
x - 7 +x = 3
2x - 7 = 3
2x = 3 + 7
2x = 10
Divide both sides by 2
x = 10/2
x = 5
Substitute x =5 in equation (I)
2y - 5 = -7
2y = -7 + 5
2y = -2
Divide both sides by 2
y = -2/2
y = -1
4y = 4*(-1) = -4
4y = -4
