.4x-5+.9x=15+.8x-7

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Solution for .4x-5+.9x=15+.8x-7 equation:


Simplifying
0.4x + -5 + 0.9x = 15 + 0.8x + -7

Reorder the terms:
-5 + 0.4x + 0.9x = 15 + 0.8x + -7

Combine like terms: 0.4x + 0.9x = 1.3x
-5 + 1.3x = 15 + 0.8x + -7

Reorder the terms:
-5 + 1.3x = 15 + -7 + 0.8x

Combine like terms: 15 + -7 = 8
-5 + 1.3x = 8 + 0.8x

Solving
-5 + 1.3x = 8 + 0.8x

Solving for variable 'x'.

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

Add '-0.8x' to each side of the equation.
-5 + 1.3x + -0.8x = 8 + 0.8x + -0.8x

Combine like terms: 1.3x + -0.8x = 0.5x
-5 + 0.5x = 8 + 0.8x + -0.8x

Combine like terms: 0.8x + -0.8x = 0.0
-5 + 0.5x = 8 + 0.0
-5 + 0.5x = 8

Add '5' to each side of the equation.
-5 + 5 + 0.5x = 8 + 5

Combine like terms: -5 + 5 = 0
0 + 0.5x = 8 + 5
0.5x = 8 + 5

Combine like terms: 8 + 5 = 13
0.5x = 13

Divide each side by '0.5'.
x = 26

Simplifying
x = 26

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