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3.1x-9=-1
We simplify the equation to the form, which is simple to understand
3.1x-9=-1
We move all terms containing x to the left and all other terms to the right.
+3.1x=-1+9
We simplify left and right side of the equation.
+3.1x=+8
We divide both sides of the equation by 3.1 to get x.
x=2.5806451612903
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