56=-2(21-19)+4(19-4)

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Solution for 56=-2(21-19)+4(19-4) equation: 


Simplifying
56 = -2(21 + -19) + 4(19 + -4)

Combine like terms: 21 + -19 = 2
56 = -2(2) + 4(19 + -4)

Multiply -2 * 2
56 = -4 + 4(19 + -4)

Combine like terms: 19 + -4 = 15
56 = -4 + 4(15)

Multiply 4 * 15
56 = -4 + 60

Combine like terms: -4 + 60 = 56
56 = 56

Add '-56' to each side of the equation.
56 + -56 = 56 + -56

Combine like terms: 56 + -56 = 0
0 = 56 + -56

Combine like terms: 56 + -56 = 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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