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Oaklyn wants to sell hamburgers for a school carnival.
She estimates the costs of ingredients for each
hamburger to be $0.75. She plans to sell the
hamburgers for $1.50 each. She knows she won't make
money right away because she also spent $18.00 on
charcoal and other items needed to setup the
hamburger booth.
Write an equation to express the costs of selling
hamburgers.