7(2-1)=21

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Solution for 7(2-1)=21 equation: 


Simplifying
7(2 + -1) = 21

Combine like terms: 2 + -1 = 1
7(1) = 21

Multiply 7 * 1
7 = 21

Solving
7 = 21

Couldn't find a variable to solve for.

This equation is invalid, the left and right sides are not equal, therefore there is no solution.

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