0.8x-0.7x+0.4w=4

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Solution for 0.8x-0.7x+0.4w=4 equation:


Simplifying
0.8x + -0.7x + 0.4w = 4

Reorder the terms:
0.4w + 0.8x + -0.7x = 4

Combine like terms: 0.8x + -0.7x = 0.1x
0.4w + 0.1x = 4

Solving
0.4w + 0.1x = 4

Solving for variable 'w'.

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

Add '-0.1x' to each side of the equation.
0.4w + 0.1x + -0.1x = 4 + -0.1x

Combine like terms: 0.1x + -0.1x = 0.0
0.4w + 0.0 = 4 + -0.1x
0.4w = 4 + -0.1x

Divide each side by '0.4'.
w = 10 + -0.25x

Simplifying
w = 10 + -0.25x

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