0.04-0.03(200-x)=5.2

Solution for 0.04-0.03(200-x)=5.2 equation:

Simplifying
0.04 + -0.03(200 + -1x) = 5.2
0.04 + (200 * -0.03 + -1x * -0.03) = 5.2
0.04 + (-6 + 0.03x) = 5.2

Combine like terms: 0.04 + -6 = -5.96
-5.96 + 0.03x = 5.2

Solving
-5.96 + 0.03x = 5.2

Solving for variable 'x'.

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

Add '5.96' to each side of the equation.
-5.96 + 5.96 + 0.03x = 5.2 + 5.96

Combine like terms: -5.96 + 5.96 = 0.00
0.00 + 0.03x = 5.2 + 5.96
0.03x = 5.2 + 5.96

Combine like terms: 5.2 + 5.96 = 11.16
0.03x = 11.16

Divide each side by '0.03'.
x = 372

Simplifying
x = 372