2(1)+9(2)=12

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Solution for 2(1)+9(2)=12 equation: 


Simplifying
2(1) + 9(2) = 12

Multiply 2 * 1
2 + 9(2) = 12

Multiply 9 * 2
2 + 18 = 12

Combine like terms: 2 + 18 = 20
20 = 12

Solving
20 = 12

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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