11+9=8x+21

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Solution for 11+9=8x+21 equation:


Simplifying
11 + 9 = 8x + 21

Combine like terms: 11 + 9 = 20
20 = 8x + 21

Reorder the terms:
20 = 21 + 8x

Solving
20 = 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.
20 + -8x = 21 + 8x + -8x

Combine like terms: 8x + -8x = 0
20 + -8x = 21 + 0
20 + -8x = 21

Add '-20' to each side of the equation.
20 + -20 + -8x = 21 + -20

Combine like terms: 20 + -20 = 0
0 + -8x = 21 + -20
-8x = 21 + -20

Combine like terms: 21 + -20 = 1
-8x = 1

Divide each side by '-8'.
x = -0.125

Simplifying
x = -0.125

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