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2x + 12 = 30 - 3x
We simplify the equation to the form, which is simple to understand
2x+12=30-3x
We move all terms containing x to the left and all other terms to the right.
+2x+3x=+30-12
We simplify left and right side of the equation.
+5x=+18
We divide both sides of the equation by 5 to get x.
x=3.6
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