.80x+.20(100)=.70(x+100)

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Solution for .80x+.20(100)=.70(x+100) equation:


Simplifying
0.80x + 0.20(100) = 0.70(x + 100)

Multiply 0.20 * 100
0.80x + 20 = 0.70(x + 100)

Reorder the terms:
20 + 0.80x = 0.70(x + 100)

Reorder the terms:
20 + 0.80x = 0.70(100 + x)
20 + 0.80x = (100 * 0.70 + x * 0.70)
20 + 0.80x = (70 + 0.70x)

Solving
20 + 0.80x = 70 + 0.70x

Solving for variable 'x'.

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

Add '-0.70x' to each side of the equation.
20 + 0.80x + -0.70x = 70 + 0.70x + -0.70x

Combine like terms: 0.80x + -0.70x = 0.1x
20 + 0.1x = 70 + 0.70x + -0.70x

Combine like terms: 0.70x + -0.70x = 0.00
20 + 0.1x = 70 + 0.00
20 + 0.1x = 70

Add '-20' to each side of the equation.
20 + -20 + 0.1x = 70 + -20

Combine like terms: 20 + -20 = 0
0 + 0.1x = 70 + -20
0.1x = 70 + -20

Combine like terms: 70 + -20 = 50
0.1x = 50

Divide each side by '0.1'.
x = 500

Simplifying
x = 500

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