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21x+6=3x-33
We simplify the equation to the form, which is simple to understand
21x+6=3x-33
We move all terms containing x to the left and all other terms to the right.
+21x-3x=-33-6
We simplify left and right side of the equation.
+18x=-39
We divide both sides of the equation by 18 to get x.
x=-2.16666666667
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