0.02p+0.04(1800-p)=90

Solution for 0.02p+0.04(1800-p)=90 equation:

Simplifying
0.02p + 0.04(1800 + -1p) = 90
0.02p + (1800 * 0.04 + -1p * 0.04) = 90
0.02p + (72 + -0.04p) = 90

Reorder the terms:
72 + 0.02p + -0.04p = 90

Combine like terms: 0.02p + -0.04p = -0.02p
72 + -0.02p = 90

Solving
72 + -0.02p = 90

Solving for variable 'p'.

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

Add '-72' to each side of the equation.
72 + -72 + -0.02p = 90 + -72

Combine like terms: 72 + -72 = 0
0 + -0.02p = 90 + -72
-0.02p = 90 + -72

Combine like terms: 90 + -72 = 18
-0.02p = 18

Divide each side by '-0.02'.
p = -900

Simplifying
p = -900