18-4x+3x=-21

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Solution for 18-4x+3x=-21 equation: 


Simplifying
18 + -4x + 3x = -21

Combine like terms: -4x + 3x = -1x
18 + -1x = -21

Solving
18 + -1x = -21

Solving for variable 'x'.

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

Add '-18' to each side of the equation.
18 + -18 + -1x = -21 + -18

Combine like terms: 18 + -18 = 0
0 + -1x = -21 + -18
-1x = -21 + -18

Combine like terms: -21 + -18 = -39
-1x = -39

Divide each side by '-1'.
x = 39

Simplifying
x = 39

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