Question

Find a number such that when 15 is subtracted from 7 times the number , the result is 10 more twice the number​

Answer 1

Let the number be x.

according to question

15 is subtracted 7times of x

that is 7x-15

result is 10 more twice the number

10+2x

7x -15 = 2x + 10

7x-2x=10+15

5x = 25

x = 5

ANSWER IS 5

Answer 2

Let the no. be x

equation 1:

7x-15

equation 2:

2x+10

By question,

7x-15 = 2x +10

7x-2x = 10+15

5x = 25

x = 25/5

Therefore x =5

Hope it helps.