7-4=2+1

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Solution for 7-4=2+1 equation: 


Simplifying
7 + -4 = 2 + 1

Combine like terms: 7 + -4 = 3
3 = 2 + 1

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

Add '-3' to each side of the equation.
3 + -3 = 3 + -3

Combine like terms: 3 + -3 = 0
0 = 3 + -3

Combine like terms: 3 + -3 = 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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