Solve for x
x=-21
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-15-4x+3x=6
Add 3x to both sides.
-15-x=6
Combine -4x and 3x to get -x.
-x=6+15
Add 15 to both sides.
-x=21
Add 6 and 15 to get 21.
x=-21
Multiply both sides by -1.
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