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There are 12 boxes of pens. Each box has m pens. 8 pens are taken away. Write an expression for the number of pens left.
12m − 8
A student has x stickers. Her friend gives her 5 more stickers. Then she gives 3 stickers away.
x + 5 − 3
There are 7 shelves. Each shelf has b books. 4 books fall off.
7b − 4
Tom saves d dollars each week. He saves for 6 weeks. Then he spends 10 dollars.
6d − 10
A box has x ribbons. Another box has 4 more ribbons than x.
x + (x + 4)
There are a bags of apples. Each bag has 9 apples. 5 apples are eaten.
9a − 5
A class has p packs of pencils. Each pack has 10 pencils. The teacher gives away 12 pencils.
10p − 12
A shop has c boxes of toy cars. Each box has 8 cars. 3 more cars are added.
8c + 3
I am thinking of two whole numbers. I triple the first one, then add the second. The answer is 18.
3x + y = 18
I am thinking of two whole numbers. I double the first one, then subtract the second. The answer is 10.
2x − y = 10
I am thinking of two whole numbers. I halve the first one, then add the second. The answer is 12.
x/2+ y = 12
I am thinking of two whole numbers. I multiply the first one by 4, then add the second. The answer is 20.
4x + y = 20
