90+0.40x-0.40x=70+0.90x-0.40x

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Solution for 90+0.40x-0.40x=70+0.90x-0.40x equation: 


Simplifying
90 + 0.40x + -0.40x = 70 + 0.90x + -0.40x

Combine like terms: 0.40x + -0.40x = 0.00
90 + 0.00 = 70 + 0.90x + -0.40x
90 = 70 + 0.90x + -0.40x

Combine like terms: 0.90x + -0.40x = 0.5x
90 = 70 + 0.5x

Solving
90 = 70 + 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.
90 + -0.5x = 70 + 0.5x + -0.5x

Combine like terms: 0.5x + -0.5x = 0.0
90 + -0.5x = 70 + 0.0
90 + -0.5x = 70

Add '-90' to each side of the equation.
90 + -90 + -0.5x = 70 + -90

Combine like terms: 90 + -90 = 0
0 + -0.5x = 70 + -90
-0.5x = 70 + -90

Combine like terms: 70 + -90 = -20
-0.5x = -20

Divide each side by '-0.5'.
x = 40

Simplifying
x = 40

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