40-8*4+13=21

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Solution for 40-8*4+13=21 equation: 


Simplifying
40 + -8 * 4 + 13 = 21

Multiply -8 * 4
40 + -32 + 13 = 21

Combine like terms: 40 + -32 = 8
8 + 13 = 21

Combine like terms: 8 + 13 = 21
21 = 21

Add '-21' to each side of the equation.
21 + -21 = 21 + -21

Combine like terms: 21 + -21 = 0
0 = 21 + -21

Combine like terms: 21 + -21 = 0
0 = 0

Solving
0 = 0

Couldn't find a variable to solve for.

This equation is an identity, all real numbers are solutions.

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