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12x+5+3x-8=0
We simplify the equation to the form, which is simple to understand
12x+5+3x-8=0
We move all terms containing x to the left and all other terms to the right.
+12x+3x=0-5+8
We simplify left and right side of the equation.
+15x=+3
We divide both sides of the equation by 15 to get x.
x=0.2
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