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7(3x+1)=(3x+1)7
We simplify the equation to the form, which is simple to understand
7(3x+1)=(3x+1)7
Reorder the terms in parentheses
+(+21x+7)=(3x+1)*7
Remove unnecessary parentheses
+21x+7=+(+3x+1+)+*7
Reorder the terms in parentheses
+21x+7=(+21x+7)
Remove unnecessary parentheses
+21x+7=+21x+7
We move all terms containing x to the left and all other terms to the right.
+21x-21x=+7-7
We simplify left and right side of the equation.
0x=0
0=0
This equation is an identity, so all real numbers are solutions.
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