18+21x-x=0.40

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Solution for 18+21x-x=0.40 equation:


Simplifying
18 + 21x + -1x = 0.40

Combine like terms: 21x + -1x = 20x
18 + 20x = 0.40

Solving
18 + 20x = 0.40

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 + 20x = 0.40 + -18

Combine like terms: 18 + -18 = 0
0 + 20x = 0.40 + -18
20x = 0.40 + -18

Combine like terms: 0.40 + -18 = -17.6
20x = -17.6

Divide each side by '20'.
x = -0.88

Simplifying
x = -0.88

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