0.5(40)+0.8x=0.7(40+x)

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Solution for 0.5(40)+0.8x=0.7(40+x) equation: 


Simplifying
0.5(40) + 0.8x = 0.7(40 + x)

Multiply 0.5 * 40
20 + 0.8x = 0.7(40 + x)
20 + 0.8x = (40 * 0.7 + x * 0.7)
20 + 0.8x = (28 + 0.7x)

Solving
20 + 0.8x = 28 + 0.7x

Solving for variable 'x'.

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

Add '-0.7x' to each side of the equation.
20 + 0.8x + -0.7x = 28 + 0.7x + -0.7x

Combine like terms: 0.8x + -0.7x = 0.1x
20 + 0.1x = 28 + 0.7x + -0.7x

Combine like terms: 0.7x + -0.7x = 0.0
20 + 0.1x = 28 + 0.0
20 + 0.1x = 28

Add '-20' to each side of the equation.
20 + -20 + 0.1x = 28 + -20

Combine like terms: 20 + -20 = 0
0 + 0.1x = 28 + -20
0.1x = 28 + -20

Combine like terms: 28 + -20 = 8
0.1x = 8

Divide each side by '0.1'.
x = 80

Simplifying
x = 80

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