6.7=7.9-0.4x

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Solution for 6.7=7.9-0.4x equation:


Simplifying
6.7 = 7.9 + -0.4x

Solving
6.7 = 7.9 + -0.4x

Solving for variable 'x'.

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

Add '0.4x' to each side of the equation.
6.7 + 0.4x = 7.9 + -0.4x + 0.4x

Combine like terms: -0.4x + 0.4x = 0.0
6.7 + 0.4x = 7.9 + 0.0
6.7 + 0.4x = 7.9

Add '-6.7' to each side of the equation.
6.7 + -6.7 + 0.4x = 7.9 + -6.7

Combine like terms: 6.7 + -6.7 = 0.0
0.0 + 0.4x = 7.9 + -6.7
0.4x = 7.9 + -6.7

Combine like terms: 7.9 + -6.7 = 1.2
0.4x = 1.2

Divide each side by '0.4'.
x = 3

Simplifying
x = 3

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