(6x+2x)•17=136

Solution:

• (6x + 2x) · 17 = 136
• 6x + 2x = 8x, so (8x) · 17 = 136x
• Thus 136x = 136
• Divide by 136: x = 1

Alternative check: divide both sides by 17 first to get 6x + 2x = 8 ⇒ 8x = 8 ⇒ x = 1.

Answer: x = 1.