(3-7)-(9-12)=

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Solution for (3-7)-(9-12)= equation: 


Simplifying
(3 + -7) + -1(9 + -12) = 0

Combine like terms: 3 + -7 = -4
(-4) + -1(9 + -12) = 0
-4 + -1(9 + -12) = 0

Combine like terms: 9 + -12 = -3
-4 + -1(-3) = 0

Multiply -1 * -3
-4 + 3 = 0

Combine like terms: -4 + 3 = -1
-1 = 0

Solving
-1 = 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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