2(2)-4(-1)=8

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Solution for 2(2)-4(-1)=8 equation: 


Simplifying
2(2) + -4(-1) = 8

Multiply 2 * 2
4 + -4(-1) = 8

Multiply -4 * -1
4 + 4 = 8

Combine like terms: 4 + 4 = 8
8 = 8

Add '-8' to each side of the equation.
8 + -8 = 8 + -8

Combine like terms: 8 + -8 = 0
0 = 8 + -8

Combine like terms: 8 + -8 = 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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