-3(1-4x)-6(3+5x)=-57

Solution for -3(1-4x)-6(3+5x)=-57 equation:

Simplifying
-3(1 + -4x) + -6(3 + 5x) = -57
(1 * -3 + -4x * -3) + -6(3 + 5x) = -57
(-3 + 12x) + -6(3 + 5x) = -57
-3 + 12x + (3 * -6 + 5x * -6) = -57
-3 + 12x + (-18 + -30x) = -57

Reorder the terms:
-3 + -18 + 12x + -30x = -57

Combine like terms: -3 + -18 = -21
-21 + 12x + -30x = -57

Combine like terms: 12x + -30x = -18x
-21 + -18x = -57

Solving
-21 + -18x = -57

Solving for variable 'x'.

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

Add '21' to each side of the equation.
-21 + 21 + -18x = -57 + 21

Combine like terms: -21 + 21 = 0
0 + -18x = -57 + 21
-18x = -57 + 21

Combine like terms: -57 + 21 = -36
-18x = -36

Divide each side by '-18'.
x = 2

Simplifying
x = 2