3(20x+100)=780

Solution for 3(20x+100)=780 equation:

Simplifying
3(20x + 100) = 780

Reorder the terms:
3(100 + 20x) = 780
(100 * 3 + 20x * 3) = 780
(300 + 60x) = 780

Solving
300 + 60x = 780

Solving for variable 'x'.

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

Add '-300' to each side of the equation.
300 + -300 + 60x = 780 + -300

Combine like terms: 300 + -300 = 0
0 + 60x = 780 + -300
60x = 780 + -300

Combine like terms: 780 + -300 = 480
60x = 480

Divide each side by '60'.
x = 8

Simplifying
x = 8