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28x-21=4x+21
We simplify the equation to the form, which is simple to understand
28x-21=4x+21
We move all terms containing x to the left and all other terms to the right.
+28x-4x=+21+21
We simplify left and right side of the equation.
+24x=+42
We divide both sides of the equation by 24 to get x.
x=1.75
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