-5+8(1+5p)=123

Solution for -5+8(1+5p)=123 equation:

Simplifying
-5 + 8(1 + 5p) = 123
-5 + (1 * 8 + 5p * 8) = 123
-5 + (8 + 40p) = 123

Combine like terms: -5 + 8 = 3
3 + 40p = 123

Solving
3 + 40p = 123

Solving for variable 'p'.

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

Add '-3' to each side of the equation.
3 + -3 + 40p = 123 + -3

Combine like terms: 3 + -3 = 0
0 + 40p = 123 + -3
40p = 123 + -3

Combine like terms: 123 + -3 = 120
40p = 120

Divide each side by '40'.
p = 3

Simplifying
p = 3