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-4x+2(-10)=-30
We simplify the equation to the form, which is simple to understand
-4x+2(-10)=-30
Reorder the terms in parentheses
-4x+(-20)=-30
Remove unnecessary parentheses
-4x-20=-30
We move all terms containing x to the left and all other terms to the right.
-4x=-30+20
We simplify left and right side of the equation.
-4x=-10
We divide both sides of the equation by -4 to get x.
x=2.5
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