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21=-(4/3)x-4
We simplify the equation to the form, which is simple to understand
21=-(4/3)x-4
Simplifying:
21=-(+1.33333333333)*x-4
Reorder the terms in parentheses
21=-(+1.33333333333x)-4
Remove unnecessary parentheses
21=-1.33333333333x-4
We move all terms containing x to the left and all other terms to the right.
+1.33333333333x=-4-21
We simplify left and right side of the equation.
+1.33333333333x=-25
We divide both sides of the equation by 01.33333333333 to get x.
x=-18.75
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