0.3x-0.2(20+x)=0.15(20)

Solution for 0.3x-0.2(20+x)=0.15(20) equation:

Simplifying
0.3x + -0.2(20 + x) = 0.15(20)
0.3x + (20 * -0.2 + x * -0.2) = 0.15(20)
0.3x + (-4 + -0.2x) = 0.15(20)

Reorder the terms:
-4 + 0.3x + -0.2x = 0.15(20)

Combine like terms: 0.3x + -0.2x = 0.1x
-4 + 0.1x = 0.15(20)

Multiply 0.15 * 20
-4 + 0.1x = 3

Solving
-4 + 0.1x = 3

Solving for variable 'x'.

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

Add '4' to each side of the equation.
-4 + 4 + 0.1x = 3 + 4

Combine like terms: -4 + 4 = 0
0 + 0.1x = 3 + 4
0.1x = 3 + 4

Combine like terms: 3 + 4 = 7
0.1x = 7

Divide each side by '0.1'.
x = 70

Simplifying
x = 70