20*20-90+40=

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Solution for 20*20-90+40= equation: 


Simplifying
20 * 20 + -90 + 40 = 0

Multiply 20 * 20
400 + -90 + 40 = 0

Combine like terms: 400 + -90 = 310
310 + 40 = 0

Combine like terms: 310 + 40 = 350
350 = 0

Solving
350 = 0

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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