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3x+4(4x+7)=199
We simplify the equation to the form, which is simple to understand
3x+4(4x+7)=199
Reorder the terms in parentheses
3x+(+16x+28)=199
Remove unnecessary parentheses
+3x+16x+28=+199
We move all terms containing x to the left and all other terms to the right.
+3x+16x=+199-28
We simplify left and right side of the equation.
+19x=+171
We divide both sides of the equation by 19 to get x.
x=9
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