5=45-.4x

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Solution for 5=45-.4x equation:


Simplifying
5 = 45 + -0.4x

Solving
5 = 45 + -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.
5 + 0.4x = 45 + -0.4x + 0.4x

Combine like terms: -0.4x + 0.4x = 0.0
5 + 0.4x = 45 + 0.0
5 + 0.4x = 45

Add '-5' to each side of the equation.
5 + -5 + 0.4x = 45 + -5

Combine like terms: 5 + -5 = 0
0 + 0.4x = 45 + -5
0.4x = 45 + -5

Combine like terms: 45 + -5 = 40
0.4x = 40

Divide each side by '0.4'.
x = 100

Simplifying
x = 100

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