[(12-11)-(10-9)]-[(12-11-10)-9]=

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Solution for [(12-11)-(10-9)]-[(12-11-10)-9]= equation:


Simplifying
[(12 + -11) + -1(10 + -9)] + -1[(12 + -11 + -10) + -9] = 0

Combine like terms: 12 + -11 = 1
[(1) + -1(10 + -9)] + -1[(12 + -11 + -10) + -9] = 0
[1 + -1(10 + -9)] + -1[(12 + -11 + -10) + -9] = 0

Combine like terms: 10 + -9 = 1
[1 + -1(1)] + -1[(12 + -11 + -10) + -9] = 0

Multiply -1 * 1
[1 + -1] + -1[(12 + -11 + -10) + -9] = 0

Combine like terms: 1 + -1 = 0
[0] + -1[(12 + -11 + -10) + -9] = 0
0 + -1[(12 + -11 + -10) + -9] = 0

Combine like terms: 12 + -11 = 1
0 + -1[(1 + -10) + -9] = 0

Combine like terms: 1 + -10 = -9
0 + -1[(-9) + -9] = 0
0 + -1[-9 + -9] = 0

Combine like terms: -9 + -9 = -18
0 + -1[-18] = 0

Multiply -1 * -18
0 + 18 = 0

Combine like terms: 0 + 18 = 18
18 = 0

Solving
18 = 0

Couldn't find a variable to solve for.

This equation is invalid, the left and right sides are not equal, therefore there is no solution.

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