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15-4=(x-7)
We simplify the equation to the form, which is simple to understand
15-4=(x-7)
Remove unnecessary parentheses
15-4=x-7
We move all terms containing x to the left and all other terms to the right.
-1x=-7-15+4
We simplify left and right side of the equation.
-1x=-18
We divide both sides of the equation by -01 to get x.
x=18
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