1.5=3.9-0.4x

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Solution for 1.5=3.9-0.4x equation:


Simplifying
1.5 = 3.9 + -0.4x

Solving
1.5 = 3.9 + -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.
1.5 + 0.4x = 3.9 + -0.4x + 0.4x

Combine like terms: -0.4x + 0.4x = 0.0
1.5 + 0.4x = 3.9 + 0.0
1.5 + 0.4x = 3.9

Add '-1.5' to each side of the equation.
1.5 + -1.5 + 0.4x = 3.9 + -1.5

Combine like terms: 1.5 + -1.5 = 0.0
0.0 + 0.4x = 3.9 + -1.5
0.4x = 3.9 + -1.5

Combine like terms: 3.9 + -1.5 = 2.4
0.4x = 2.4

Divide each side by '0.4'.
x = 6

Simplifying
x = 6

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