100+.80x=70+.90x

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Solution for 100+.80x=70+.90x equation:


Simplifying
100 + 0.80x = 70 + 0.90x

Solving
100 + 0.80x = 70 + 0.90x

Solving for variable 'x'.

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

Add '-0.90x' to each side of the equation.
100 + 0.80x + -0.90x = 70 + 0.90x + -0.90x

Combine like terms: 0.80x + -0.90x = -0.1x
100 + -0.1x = 70 + 0.90x + -0.90x

Combine like terms: 0.90x + -0.90x = 0.00
100 + -0.1x = 70 + 0.00
100 + -0.1x = 70

Add '-100' to each side of the equation.
100 + -100 + -0.1x = 70 + -100

Combine like terms: 100 + -100 = 0
0 + -0.1x = 70 + -100
-0.1x = 70 + -100

Combine like terms: 70 + -100 = -30
-0.1x = -30

Divide each side by '-0.1'.
x = 300

Simplifying
x = 300

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