7.8=7-x+1.2x

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Solution for 7.8=7-x+1.2x equation:


Simplifying
7.8 = 7 + -1x + 1.2x

Combine like terms: -1x + 1.2x = 0.2x
7.8 = 7 + 0.2x

Solving
7.8 = 7 + 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.
7.8 + -0.2x = 7 + 0.2x + -0.2x

Combine like terms: 0.2x + -0.2x = 0.0
7.8 + -0.2x = 7 + 0.0
7.8 + -0.2x = 7

Add '-7.8' to each side of the equation.
7.8 + -7.8 + -0.2x = 7 + -7.8

Combine like terms: 7.8 + -7.8 = 0.0
0.0 + -0.2x = 7 + -7.8
-0.2x = 7 + -7.8

Combine like terms: 7 + -7.8 = -0.8
-0.2x = -0.8

Divide each side by '-0.2'.
x = 4

Simplifying
x = 4

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