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21+5 (x-4)=4 (x+5)
We simplify the equation to the form, which is simple to understand
21+5(x-4)=4(x+5)
Reorder the terms in parentheses
21+(+5x-20)=4*(x+5)
Remove unnecessary parentheses
+21+5x-20=+4+*(+x+5+)
Reorder the terms in parentheses
21+5x-20=+(+4x+20)
Remove unnecessary parentheses
+21+5x-20=+4x+20
We move all terms containing x to the left and all other terms to the right.
+5x-4x=+20-21+20
We simplify left and right side of the equation.
+1x=+19
We divide both sides of the equation by 1 to get x.
x=19
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