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142-(7x+9)=7(x+4)+x
We simplify the equation to the form, which is simple to understand
142-(7x+9)=7(x+4)+x
Remove unnecessary parentheses
142-7x-9=7*(x+4)+x
Reorder the terms in parentheses
142-7x-9=+(+7x+28)+x
Remove unnecessary parentheses
+142-7x-9=+7x+28+x
We move all terms containing x to the left and all other terms to the right.
-7x-7x-1x=+28-142+9
We simplify left and right side of the equation.
-15x=-105
We divide both sides of the equation by -15 to get x.
x=7
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