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5x+3+2x=45
We simplify the equation to the form, which is simple to understand
5x+3+2x=45
We move all terms containing x to the left and all other terms to the right.
+5x+2x=+45-3
We simplify left and right side of the equation.
+7x=+42
We divide both sides of the equation by 7 to get x.
x=6
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