.3x-9=1.1x-21

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Solution for .3x-9=1.1x-21 equation:


Simplifying
0.3x + -9 = 1.1x + -21

Reorder the terms:
-9 + 0.3x = 1.1x + -21

Reorder the terms:
-9 + 0.3x = -21 + 1.1x

Solving
-9 + 0.3x = -21 + 1.1x

Solving for variable 'x'.

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

Add '-1.1x' to each side of the equation.
-9 + 0.3x + -1.1x = -21 + 1.1x + -1.1x

Combine like terms: 0.3x + -1.1x = -0.8x
-9 + -0.8x = -21 + 1.1x + -1.1x

Combine like terms: 1.1x + -1.1x = 0.0
-9 + -0.8x = -21 + 0.0
-9 + -0.8x = -21

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

Combine like terms: -9 + 9 = 0
0 + -0.8x = -21 + 9
-0.8x = -21 + 9

Combine like terms: -21 + 9 = -12
-0.8x = -12

Divide each side by '-0.8'.
x = 15

Simplifying
x = 15

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