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7(3)-2(3)=15
We simplify the equation to the form, which is simple to understand
7(3)-2(3)=15
Reorder the terms in parentheses
+(+21)-2*(3)=15
Remove unnecessary parentheses
+21-2+*(+3+)=+15
Reorder the terms in parentheses
+21+(-6)=15
Remove unnecessary parentheses
+21-6=+15
We move all terms containing to the left and all other terms to the right.
0=+15-21+6
We simplify left and right side of the equation.
0=0
0=0
This equation is an identity, so all real numbers are solutions.
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