0.6(x+70)+0.6x=78

Solution for 0.6(x+70)+0.6x=78 equation:

Simplifying
0.6(x + 70) + 0.6x = 78

Reorder the terms:
0.6(70 + x) + 0.6x = 78
(70 * 0.6 + x * 0.6) + 0.6x = 78
(42 + 0.6x) + 0.6x = 78

Combine like terms: 0.6x + 0.6x = 1.2x
42 + 1.2x = 78

Solving
42 + 1.2x = 78

Solving for variable 'x'.

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

Add '-42' to each side of the equation.
42 + -42 + 1.2x = 78 + -42

Combine like terms: 42 + -42 = 0
0 + 1.2x = 78 + -42
1.2x = 78 + -42

Combine like terms: 78 + -42 = 36
1.2x = 36

Divide each side by '1.2'.
x = 30

Simplifying
x = 30