0.8x-9=2.3x-21

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Solution for 0.8x-9=2.3x-21 equation:


Simplifying
0.8x + -9 = 2.3x + -21

Reorder the terms:
-9 + 0.8x = 2.3x + -21

Reorder the terms:
-9 + 0.8x = -21 + 2.3x

Solving
-9 + 0.8x = -21 + 2.3x

Solving for variable 'x'.

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

Add '-2.3x' to each side of the equation.
-9 + 0.8x + -2.3x = -21 + 2.3x + -2.3x

Combine like terms: 0.8x + -2.3x = -1.5x
-9 + -1.5x = -21 + 2.3x + -2.3x

Combine like terms: 2.3x + -2.3x = 0.0
-9 + -1.5x = -21 + 0.0
-9 + -1.5x = -21

Add '9' to each side of the equation.
-9 + 9 + -1.5x = -21 + 9

Combine like terms: -9 + 9 = 0
0 + -1.5x = -21 + 9
-1.5x = -21 + 9

Combine like terms: -21 + 9 = -12
-1.5x = -12

Divide each side by '-1.5'.
x = 8

Simplifying
x = 8

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