Set up equation and solve them
One-fifth of a number minus 4gives 3
Step 1 : To form and Equation
Let the number is x
According to the condition,
x5-4=3
Step 2 : To solve the Equation
Given :- x5-4=3
⇒ x5-4+4=3+4 (Adding 4 on both sides)
x5=7
5×x5=7×5
x=35
Therefore, the value of x is 35
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 add 3 to it, 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 of the number, the result is 23.