3(-1x+4)=-21

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Solution for 3(-1x+4)=-21 equation: 


Simplifying
3(-1x + 4) = -21

Reorder the terms:
3(4 + -1x) = -21
(4 * 3 + -1x * 3) = -21
(12 + -3x) = -21

Solving
12 + -3x = -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 + -3x = -21 + -12

Combine like terms: 12 + -12 = 0
0 + -3x = -21 + -12
-3x = -21 + -12

Combine like terms: -21 + -12 = -33
-3x = -33

Divide each side by '-3'.
x = 11

Simplifying
x = 11

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