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.5x+2100=3.5x
We simplify the equation to the form, which is simple to understand
.5x+2100=3.5x
We move all terms containing x to the left and all other terms to the right.
+ 0.5x-3.5x=-2100
We simplify left and right side of the equation.
-3x=-2100
We divide both sides of the equation by -3 to get x.
x=700
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