-0.2(40)+0.7x=0.3(40+x)

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Solution for -0.2(40)+0.7x=0.3(40+x) equation: 


Simplifying
-0.2(40) + 0.7x = 0.3(40 + x)

Multiply -0.2 * 40
-8 + 0.7x = 0.3(40 + x)
-8 + 0.7x = (40 * 0.3 + x * 0.3)
-8 + 0.7x = (12 + 0.3x)

Solving
-8 + 0.7x = 12 + 0.3x

Solving for variable 'x'.

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

Add '-0.3x' to each side of the equation.
-8 + 0.7x + -0.3x = 12 + 0.3x + -0.3x

Combine like terms: 0.7x + -0.3x = 0.4x
-8 + 0.4x = 12 + 0.3x + -0.3x

Combine like terms: 0.3x + -0.3x = 0.0
-8 + 0.4x = 12 + 0.0
-8 + 0.4x = 12

Add '8' to each side of the equation.
-8 + 8 + 0.4x = 12 + 8

Combine like terms: -8 + 8 = 0
0 + 0.4x = 12 + 8
0.4x = 12 + 8

Combine like terms: 12 + 8 = 20
0.4x = 20

Divide each side by '0.4'.
x = 50

Simplifying
x = 50

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