.6(x+70)+0.8x=91

Solution for .6(x+70)+0.8x=91 equation:

Simplifying
0.6(x + 70) + 0.8x = 91

Reorder the terms:
0.6(70 + x) + 0.8x = 91
(70 * 0.6 + x * 0.6) + 0.8x = 91
(42 + 0.6x) + 0.8x = 91

Combine like terms: 0.6x + 0.8x = 1.4x
42 + 1.4x = 91

Solving
42 + 1.4x = 91

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 + 1.4x = 91 + -42

Combine like terms: 42 + -42 = 0
0 + 1.4x = 91 + -42
1.4x = 91 + -42

Combine like terms: 91 + -42 = 49
1.4x = 49

Divide each side by '1.4'.
x = 35

Simplifying
x = 35