1=0.4x-0.9x-4

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Solution for 1=0.4x-0.9x-4 equation:


Simplifying
1 = 0.4x + -0.9x + -4

Reorder the terms:
1 = -4 + 0.4x + -0.9x

Combine like terms: 0.4x + -0.9x = -0.5x
1 = -4 + -0.5x

Solving
1 = -4 + -0.5x

Solving for variable 'x'.

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

Add '0.5x' to each side of the equation.
1 + 0.5x = -4 + -0.5x + 0.5x

Combine like terms: -0.5x + 0.5x = 0.0
1 + 0.5x = -4 + 0.0
1 + 0.5x = -4

Add '-1' to each side of the equation.
1 + -1 + 0.5x = -4 + -1

Combine like terms: 1 + -1 = 0
0 + 0.5x = -4 + -1
0.5x = -4 + -1

Combine like terms: -4 + -1 = -5
0.5x = -5

Divide each side by '0.5'.
x = -10

Simplifying
x = -10

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