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100-7,5*x=10
We simplify the equation to the form, which is simple to understand
100-7,5*x=10
We move all terms containing x to the left and all other terms to the right.
-7.5x=+10-100
We simplify left and right side of the equation.
-7.5x=-90
We divide both sides of the equation by -7.5 to get x.
x=12
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