Janice can type 6 sentences per minute. Today at work, Janice continued working on a paper she started typing yesterday. She typed for 20 minutes, took a break, and typed 15 minutes longer. She then had to erase 40 sentences she had typed incorrectly. After a meeting, she typed for 18 minutes more. In all, the paper had 536 sentences by the end of today. How many sentences did she start with today?
How many sentences did Janice have from yesterday? ** Janice had X sentences from yesterday already typed to start with today.
How many sentences did Janice type before her break? ** Janice typed 6 * 20 = <<6*20=120>>120 sentences before her break.
How many sentences did Janice type after her break? ** She typed 6 * 15 = <<6*15=90>>90 sentences after her break.
How many sentences did Janice type after her meeting? ** She typed 6 * 18 = <<6*18=108>>108 sentences after her meeting.
How many sentences did Janice type today? ** Therefore, she typed 120 + 90 + 108 = <<120+90+108=318>>318 sentences today in all.
How many sentences did Janie have left after erasing? ** She had to erase 40 sentences, so she had 318 - 40 = <<318-40=278>>278 sentences that she typed today left.
How many sentences did Janice start with today? ** The paper had X + 278 = 536 sentences at the end of today.
How many sentences did Janice start with today? ** Thus, she had X = 536 - 278 = <<536-278=258>>258 sentences typed on the paper to start with today.
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