Answers:
x = -5
y = 9
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Work Shown:
Start by solving the second equation for x.
3x = -15
3x/3 = -15/3 .... divide both sides by 3
x = -5
Then plug this into the first equation and isolate y.
6x + 4y = 6
6(-5) + 4y = 6 .... every x replaced with -5
-30 + 4y = 6
-30+4y+30 = 6+30 .... add 30 to both sides
4y = 36
4y/4 = 36/4 .... divide both sides by 4
y = 9