0.4x+5=7.8

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Solution for 0.4x+5=7.8 equation: 


Simplifying
0.4x + 5 = 7.8

Reorder the terms:
5 + 0.4x = 7.8

Solving
5 + 0.4x = 7.8

Solving for variable 'x'.

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

Add '-5' to each side of the equation.
5 + -5 + 0.4x = 7.8 + -5

Combine like terms: 5 + -5 = 0
0 + 0.4x = 7.8 + -5
0.4x = 7.8 + -5

Combine like terms: 7.8 + -5 = 2.8
0.4x = 2.8

Divide each side by '0.4'.
x = 7

Simplifying
x = 7

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