21=8x+1-3x

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Solution for 21=8x+1-3x equation:


Simplifying
21 = 8x + 1 + -3x

Reorder the terms:
21 = 1 + 8x + -3x

Combine like terms: 8x + -3x = 5x
21 = 1 + 5x

Solving
21 = 1 + 5x

Solving for variable 'x'.

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

Add '-5x' to each side of the equation.
21 + -5x = 1 + 5x + -5x

Combine like terms: 5x + -5x = 0
21 + -5x = 1 + 0
21 + -5x = 1

Add '-21' to each side of the equation.
21 + -21 + -5x = 1 + -21

Combine like terms: 21 + -21 = 0
0 + -5x = 1 + -21
-5x = 1 + -21

Combine like terms: 1 + -21 = -20
-5x = -20

Divide each side by '-5'.
x = 4

Simplifying
x = 4

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