3*7-20=12-2*7+3

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Solution for 3*7-20=12-2*7+3 equation: 


Simplifying
3 * 7 + -20 = 12 + -2 * 7 + 3

Multiply 3 * 7
21 + -20 = 12 + -2 * 7 + 3

Combine like terms: 21 + -20 = 1
1 = 12 + -2 * 7 + 3

Multiply -2 * 7
1 = 12 + -14 + 3

Combine like terms: 12 + -14 = -2
1 = -2 + 3

Combine like terms: -2 + 3 = 1
1 = 1

Add '-1' to each side of the equation.
1 + -1 = 1 + -1

Combine like terms: 1 + -1 = 0
0 = 1 + -1

Combine like terms: 1 + -1 = 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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