Question

Set up equations and solve them to find the unknown numbers in the following cases: (a) Add 4 to eight times a number; you get 60. (b) One fifth of a number minus 4 gives 3. (c) If I take three fourths of a number and count up 3 more, I get 21. (d) When I subtracted 11 from twice a number, the result was 15. (e) Munna subtracts thrice the number of notebooks he has from 50, he finds the result to be 8. (f) Ibenhal thinks of a number. If she adds 19 to it and divides the sum by 5, she will get 8. (g) Anwar thinks of a number. If he takes away 7 from `5/2` of the number, the result is `11/2`.

Answer 1

a) 8x+4=60
8x=56
x=7
b)`x/5-4=3`
`x/5=7`
x=35.
c)`3/4x+3=21`
`3/4x=18`
x=24
d)2y-11=15
2y=26
y=13
e)50-3x=8
3x=42
x=14
f)`(x+19)/5=8`
x+19=40
x=21
g)`5/2x-7=11/2`
`5/2x=25/2`
x=5.