6x + 7y = 5 --- (1)
4x - 2y = -10 --- (2)
From (2), we have:
2x - y = -5 --- (3)
Subtracting thrice of (3) from (1), we will have:
(6x + 7y) - 3(2x - y) = 5 - 3(-5)
6x + 7y - 6x + 3y = 5 + 15
10y = 20
y = 20 / 10
y = 2
Adding 7 times of (3) to (1), we will get:
7(2x - y) + (6x + 7y) = 7(-5) + 5
14x - 7y + 6x + 7y = -35 + 5
20x = -30
x = -30 / 20
x = -1.5
Hence, x = -1.5 and y = 2.