2(5-7)=18

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Solution for 2(5-7)=18 equation: 


Simplifying
2(5 + -7) = 18

Combine like terms: 5 + -7 = -2
2(-2) = 18

Multiply 2 * -2
-4 = 18

Solving
-4 = 18

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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