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-42=7x+3(-5x+2)
We simplify the equation to the form, which is simple to understand
-42=7x+3(-5x+2)
Reorder the terms in parentheses
-42=7x+(-15x+6)
Remove unnecessary parentheses
-42=+7x-15x+6
We move all terms containing x to the left and all other terms to the right.
-7x+15x=+6+42
We simplify left and right side of the equation.
+8x=+48
We divide both sides of the equation by 8 to get x.
x=6
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