6+3=8x-21

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Solution for 6+3=8x-21 equation: 


Simplifying
6 + 3 = 8x + -21

Combine like terms: 6 + 3 = 9
9 = 8x + -21

Reorder the terms:
9 = -21 + 8x

Solving
9 = -21 + 8x

Solving for variable 'x'.

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

Add '-8x' to each side of the equation.
9 + -8x = -21 + 8x + -8x

Combine like terms: 8x + -8x = 0
9 + -8x = -21 + 0
9 + -8x = -21

Add '-9' to each side of the equation.
9 + -9 + -8x = -21 + -9

Combine like terms: 9 + -9 = 0
0 + -8x = -21 + -9
-8x = -21 + -9

Combine like terms: -21 + -9 = -30
-8x = -30

Divide each side by '-8'.
x = 3.75

Simplifying
x = 3.75

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