-3(5x-4)=-21

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Solution for -3(5x-4)=-21 equation:


Simplifying
-3(5x + -4) = -21

Reorder the terms:
-3(-4 + 5x) = -21
(-4 * -3 + 5x * -3) = -21
(12 + -15x) = -21

Solving
12 + -15x = -21

Solving for variable 'x'.

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

Add '-12' to each side of the equation.
12 + -12 + -15x = -21 + -12

Combine like terms: 12 + -12 = 0
0 + -15x = -21 + -12
-15x = -21 + -12

Combine like terms: -21 + -12 = -33
-15x = -33

Divide each side by '-15'.
x = 2.2

Simplifying
x = 2.2

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