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10x+3-7x=12-3x+9
We simplify the equation to the form, which is simple to understand
10x+3-7x=12-3x+9
We move all terms containing x to the left and all other terms to the right.
+10x-7x+3x=+12+9-3
We simplify left and right side of the equation.
+6x=+18
We divide both sides of the equation by 6 to get x.
x=3
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