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15-8x=-4(1+2x)
We simplify the equation to the form, which is simple to understand
15-8x=-4(1+2x)
Reorder the terms in parentheses
15-8x=+(-4-8x)
Remove unnecessary parentheses
+15-8x=-4-8x
We move all terms containing x to the left and all other terms to the right.
-8x+8x=-4-15
We simplify left and right side of the equation.
0x=-19
0=-19
The left and right sides are not equal, therefore there is no solution. This equation is invalid.
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