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45+7x=20
We simplify the equation to the form, which is simple to understand
45+7x=20
We move all terms containing x to the left and all other terms to the right.
+7x=+20-45
We simplify left and right side of the equation.
+7x=-25
We divide both sides of the equation by 7 to get x.
x=-3.57142857143
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