5. A number is times, another number. If their sum is 70, find the numbers.
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Let the numbers be x and y
According to the question
x = 2/5y
x + y = 70
2/5y + y = 70
2y + 5y/5 = 70
7y = 350
y = 350 ÷ 7
y = 50
x + 50 = 70
x = 70 - 50
x = 20
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