0.02x+0.08(20-x)=1.3

Solution for 0.02x+0.08(20-x)=1.3 equation:

Simplifying
0.02x + 0.08(20 + -1x) = 1.3
0.02x + (20 * 0.08 + -1x * 0.08) = 1.3
0.02x + (1.6 + -0.08x) = 1.3

Reorder the terms:
1.6 + 0.02x + -0.08x = 1.3

Combine like terms: 0.02x + -0.08x = -0.06x
1.6 + -0.06x = 1.3

Solving
1.6 + -0.06x = 1.3

Solving for variable 'x'.

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

Add '-1.6' to each side of the equation.
1.6 + -1.6 + -0.06x = 1.3 + -1.6

Combine like terms: 1.6 + -1.6 = 0.0
0.0 + -0.06x = 1.3 + -1.6
-0.06x = 1.3 + -1.6

Combine like terms: 1.3 + -1.6 = -0.3
-0.06x = -0.3

Divide each side by '-0.06'.
x = 5

Simplifying
x = 5