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(21/7)-2(-3)=0
We simplify the equation to the form, which is simple to understand
(21/7)-2(-3)=0
Simplifying:
(+3)-2*(-3)=0
Remove unnecessary parentheses
+3-2*(-3)=0
Reorder the terms in parentheses
+3+(+6)=0
Remove unnecessary parentheses
+3+6=0
We move all terms containing to the left and all other terms to the right.
0=0-3-6
We simplify left and right side of the equation.
0=-9
0=-9
The left and right sides are not equal, therefore there is no solution. This equation is invalid.
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