4(10-3)-(10-3)=21

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Solution for 4(10-3)-(10-3)=21 equation: 


Simplifying
4(10 + -3) + -1(10 + -3) = 21

Combine like terms: 10 + -3 = 7
4(7) + -1(10 + -3) = 21

Multiply 4 * 7
28 + -1(10 + -3) = 21

Combine like terms: 10 + -3 = 7
28 + -1(7) = 21

Multiply -1 * 7
28 + -7 = 21

Combine like terms: 28 + -7 = 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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