Seven more than three times a number is 31. Find
the number.
a) 5
b) 6
c) 7
d) 8
Solution:Three time a number = 3x
7 more than 3x = 3x + 7 = 31
3x + 7 = 31 3x = 31
3x = 24 x= 24/3x= 8
What is the value of variable in the given equation? (3x + 1= 7)
a) 8
b) 6
c) 4
d) 2
Solution:3x+1 =7 3x=7 ̶ 1 3x = 6 x=6/3 x=2
If 5 are added to a number(x) then the number becomes 12. Find the number.
a) 7
b) 17
c) 60
d) 65
Solution:let the number is = x
x + 5 = 12---- (1) x= 12 ̶ 5 x= 7
(now put x= 7 in equation (1) 12=12
If 9 is added to a number(x) then the number becomes 25. Find the number.
a) 34
b) 16
c) 225
d) 237
Solution:let the number is = x
x + 9 = 25---- (1) x= 25
(now put x= 16 in equation (1) 25=25
If 5 is subtracted from a number it becomes 13, find the number.
a) 4
b) 8
c) 18
d) 24
Solution:let the number is = x
x ̶ 5 =13 x= 13 + 5 x= 18
Find the number whose 3 times when subtracted from 9 becomes 12.
a) 1
b) ̶ 1
c) 3
d) ̶ 3
Solution:let the number = x
3 times of the number = 3x
9 ̶ 3x =12 -3x =12 - 9
-3x = 3 x=-1
