.8x-.4(20+x)=.6(20)

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Solution for .8x-.4(20+x)=.6(20) equation:


Simplifying
0.8x + -0.4(20 + x) = 0.6(20)
0.8x + (20 * -0.4 + x * -0.4) = 0.6(20)
0.8x + (-8 + -0.4x) = 0.6(20)

Reorder the terms:
-8 + 0.8x + -0.4x = 0.6(20)

Combine like terms: 0.8x + -0.4x = 0.4x
-8 + 0.4x = 0.6(20)

Multiply 0.6 * 20
-8 + 0.4x = 12

Solving
-8 + 0.4x = 12

Solving for variable 'x'.

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

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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