10=x+0.8(9-x)

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Solution for 10=x+0.8(9-x) equation:


Simplifying
10 = x + 0.8(9 + -1x)
10 = x + (9 * 0.8 + -1x * 0.8)
10 = x + (7.2 + -0.8x)

Reorder the terms:
10 = 7.2 + x + -0.8x

Combine like terms: x + -0.8x = 0.2x
10 = 7.2 + 0.2x

Solving
10 = 7.2 + 0.2x

Solving for variable 'x'.

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

Add '-0.2x' to each side of the equation.
10 + -0.2x = 7.2 + 0.2x + -0.2x

Combine like terms: 0.2x + -0.2x = 0.0
10 + -0.2x = 7.2 + 0.0
10 + -0.2x = 7.2

Add '-10' to each side of the equation.
10 + -10 + -0.2x = 7.2 + -10

Combine like terms: 10 + -10 = 0
0 + -0.2x = 7.2 + -10
-0.2x = 7.2 + -10

Combine like terms: 7.2 + -10 = -2.8
-0.2x = -2.8

Divide each side by '-0.2'.
x = 14

Simplifying
x = 14

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