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.15x+.65=12.5
We simplify the equation to the form, which is simple to understand
.15x+.65=12.5
We move all terms containing x to the left and all other terms to the right.
+ 0.15x=+12.5-0.65
We simplify left and right side of the equation.
+ 0.15x=+11.85
We divide both sides of the equation by 0.15 to get x.
x=79
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