Billy weighs 135lbs. This is 18lbs more than one-third of his brothers weight. How much does his brother weigh?

Question

It’s solving equations but I need to know what the number is please !

Answer 1

Whenever you have a problem like this, you need to figure out the mathematical symbols for the words in the problem.

18 more than is +18

1/3 his brother's weight is 1/3 x b

So 135=18 + 1/3b

Subtract 18 from both sides: 117 = 1/3b

Multiply both sides by 3: 351 = b. His brother weighs 351 pounds.