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2a + 2b = 160

But b = a + 40 so 2a + 2(a + 40) = 160

ie 2a + 2a + 80 = 160

or 4a = 80 ie a = 20

Then b = a + 40 gives b = 20 + 40 = 60

Solution: a = 20, b = 60

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14y ago

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