18=-5(4x+3)+21x

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Solution for 18=-5(4x+3)+21x equation:


Simplifying
18 = -5(4x + 3) + 21x

Reorder the terms:
18 = -5(3 + 4x) + 21x
18 = (3 * -5 + 4x * -5) + 21x
18 = (-15 + -20x) + 21x

Combine like terms: -20x + 21x = 1x
18 = -15 + 1x

Solving
18 = -15 + 1x

Solving for variable 'x'.

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

Add '-1x' to each side of the equation.
18 + -1x = -15 + 1x + -1x

Combine like terms: 1x + -1x = 0
18 + -1x = -15 + 0
18 + -1x = -15

Add '-18' to each side of the equation.
18 + -18 + -1x = -15 + -18

Combine like terms: 18 + -18 = 0
0 + -1x = -15 + -18
-1x = -15 + -18

Combine like terms: -15 + -18 = -33
-1x = -33

Divide each side by '-1'.
x = 33

Simplifying
x = 33

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