7x-0.4=8x

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Solution for 7x-0.4=8x equation:


Simplifying
7x + -0.4 = 8x

Reorder the terms:
-0.4 + 7x = 8x

Solving
-0.4 + 7x = 8x

Solving for variable 'x'.

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

Add '-8x' to each side of the equation.
-0.4 + 7x + -8x = 8x + -8x

Combine like terms: 7x + -8x = -1x
-0.4 + -1x = 8x + -8x

Combine like terms: 8x + -8x = 0
-0.4 + -1x = 0

Add '0.4' to each side of the equation.
-0.4 + 0.4 + -1x = 0 + 0.4

Combine like terms: -0.4 + 0.4 = 0.0
0.0 + -1x = 0 + 0.4
-1x = 0 + 0.4

Combine like terms: 0 + 0.4 = 0.4
-1x = 0.4

Divide each side by '-1'.
x = -0.4

Simplifying
x = -0.4

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