Question

13. If 10 is substracted from u times a number
the difference is twice that number. Find
the number.​

Answer 1

Step-by-step explanation:

Let the number be x and y

first equation written as

x−y=10 ----- (1)

second equation written as

2x−y=17 ----- (2)

Form equation (1)

Put the value of x in equation (2)

2(10+y)−y=17

20+2y=17

y=17−20

y=−3

Substitute the value of y=−3 in equation (1)

x−(3)=10

x=10−3

x=7

Therefore the numbers are 7 and -3