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Mazyrski [523]
3 years ago
7

When a number is multiplied by 5 before subtracting from 78 the result obtained is the same as three times the sum of the number

and 5 find the number
Mathematics
1 answer:
slavikrds [6]3 years ago
6 0

Answer:

x = 7.875

Step-by-step explanation:

Let the number = x

When a number is multiplied by 5 before subtracting from 78 the result obtained is the same as three times the sum of the number and 5 find the number

Hence,

78 -(x × 5) = 3(x + 5)

Expand the brackets

78 - 5x = 3x + 15

Collect like terms

78 -15 = 3x + 5x

63 = 8x

x = 63/8

x = 7.875

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