7(3-x)-3(7-x)=3(7-x)-7(3-x)

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Solution for 7(3-x)-3(7-x)=3(7-x)-7(3-x) equation:


7(3-x)-3(7-x)=3(7-x)-7(3-x)

We simplify the equation to the form, which is simple to understand 
7(3-x)-3(7-x)=3(7-x)-7(3-x)

Reorder the terms in parentheses
+(+21-7x)-3*(7-x)=3*(7-x)-7*(3-x)

Remove unnecessary parentheses
+21-7x-3+*(+7-x+)=+3+*(+7-x+)-7+*(+3-x+)

Reorder the terms in parentheses
+21-7x+(-21+3x)=3*(7-x)-7*(3-x)

Remove unnecessary parentheses
+21-7x-21+3x=+3+*(+7-x+)-7+*(+3-x+)

Reorder the terms in parentheses
+21-7x-21+3x=+(+21-3x)-7*(3-x)

Remove unnecessary parentheses
+21-7x-21+3x=+21-3x-7+*(+3-x+)

Reorder the terms in parentheses
+21-7x-21+3x=+21-3x+(-21+7x)

Remove unnecessary parentheses
+21-7x-21+3x=+21-3x-21+7x

We move all terms containing x to the left and all other terms to the right. 
-7x+3x+3x-7x=+21-21-21+21

We simplify left and right side of the equation. 
-8x=0

We divide both sides of the equation by -8 to get x. 
x=-0

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