Quick have 5 mins mike’s age is three years more than four times his younger brother’s age. if the sum of their ages is less than 138, then find the oldest age that mike’s brother could be. i have 4x+3< 138 but i end up with x< 33.5 the answer is 26 why is this pls and explain in detail

The spring the owner of a sporting good store decreases the price of winter gloves from $10 to $8 each increases the price of swimming goggles from $8 to $10 without doing the math you think the percent decrease in the price of the gloves the same as the percent increase of the goggles explain why or why not