12-1(1x+3)=10

Solution for 12-1(1x+3)=10 equation:

Simplifying
12 + -1(1x + 3) = 10

Reorder the terms:
12 + -1(3 + 1x) = 10
12 + (3 * -1 + 1x * -1) = 10
12 + (-3 + -1x) = 10

Combine like terms: 12 + -3 = 9
9 + -1x = 10

Solving
9 + -1x = 10

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-9' to each side of the equation.
9 + -9 + -1x = 10 + -9

Combine like terms: 9 + -9 = 0
0 + -1x = 10 + -9
-1x = 10 + -9

Combine like terms: 10 + -9 = 1
-1x = 1

Divide each side by '-1'.
x = -1

Simplifying
x = -1