Question 605111
 6x + 7y = -8
-6x- 14y = 22 
--------------adding eliminates x, find y
-7y = 14
y = {{{14/(-7)}}}
y = -2
:
Find x using the 1st equation
6x + 7(-2) = -8
6x - 14 = -8
6x = -8 + 14
6x = 6
x = 1
:
:
Check solutions in the 2nd equation
-6(1) - 14(-2) = 22
-6 + 28 = 22