-40+(-10)+(-10)+(-10)+80+90=100

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Solution for -40+(-10)+(-10)+(-10)+80+90=100 equation: 


Simplifying
-40 + (-10) + (-10) + (-10) + 80 + 90 = 100
-40 + -10 + (-10) + (-10) + 80 + 90 = 100
-40 + -10 + -10 + (-10) + 80 + 90 = 100
-40 + -10 + -10 + -10 + 80 + 90 = 100

Combine like terms: -40 + -10 = -50
-50 + -10 + -10 + 80 + 90 = 100

Combine like terms: -50 + -10 = -60
-60 + -10 + 80 + 90 = 100

Combine like terms: -60 + -10 = -70
-70 + 80 + 90 = 100

Combine like terms: -70 + 80 = 10
10 + 90 = 100

Combine like terms: 10 + 90 = 100
100 = 100

Add '-100' to each side of the equation.
100 + -100 = 100 + -100

Combine like terms: 100 + -100 = 0
0 = 100 + -100

Combine like terms: 100 + -100 = 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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