Mathematics
cml296
2021-02-23 13:52:12
Twenty less than 8 times a number is the same as 15 more than the number written in number form
ANSWERS
martyfr
2021-02-23 18:14:44

8x - 20 = x + 15 let x be the number. twenty less than 8 times a number is 8x - 20 15 more than the number is x + 15 8x - 20 = x + 15 8x - x = 15 + 20 7x = 35 7x / 7 = 35 / 7 x = 5 To check: 8x - 20 = x + 15 8(5) - 20 = 5 + 15 40 - 20 = 20 20 = 20

help20
2021-02-23 18:15:59

Let the number be x. We have an equation: 8x -20= 15+ x ⇒ 8x -x= 15+20 ⇒ 7x= 35 ⇒ x= 35/7 ⇒ x= 5 The number is 5~

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