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x+3.1=7.5
We simplify the equation to the form, which is simple to understand
x+3.1=7.5
We move all terms containing x to the left and all other terms to the right.
+1x=+7.5-3.1
We simplify left and right side of the equation.
+1x=+4.4
We divide both sides of the equation by 1 to get x.
x=4.4
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