4-1+2(-1-3)=3-1+-1-12

Solution for 4-1+2(-1-3)=3-1+-1-12 equation:

Simplifying
4 + -1 + 2(-1 + -3) = 3 + -1 + -1 + -12

Combine like terms: -1 + -3 = -4
4 + -1 + 2(-4) = 3 + -1 + -1 + -12

Multiply 2 * -4
4 + -1 + -8 = 3 + -1 + -1 + -12

Combine like terms: 4 + -1 = 3
3 + -8 = 3 + -1 + -1 + -12

Combine like terms: 3 + -8 = -5
-5 = 3 + -1 + -1 + -12

Combine like terms: 3 + -1 = 2
-5 = 2 + -1 + -12

Combine like terms: 2 + -1 = 1
-5 = 1 + -12

Combine like terms: 1 + -12 = -11
-5 = -11

Solving
-5 = -11

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.