Question 1(b)
Set up equations and solve them to find the unknown numbers in the following cases:
One - fifth of a number minus 4 gives 3.

Open in App

Solution

Let the number be y.
According to the question, $\frac{y}{5} - 4 = 3$
$\Rightarrow \frac{y}{5} = 3 + 4 \Rightarrow \frac{y}{5} = 7 \Rightarrow y = 7 \times 5 \Rightarrow y = 35$

Suggest Corrections

Similar questions

Q. Question 1(a)
Set up equations and solve them to find the unknown numbers in the following cases:
Add 4 to eight times a number; you get 60.

Q. 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 substracted 11 from twice a number , the result was 15 .
(e) Munna substracts 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 .

Q. Question 1(g)
Set up equations and solve them to find the unknown numbers in the following cases:
Think of a number. If he takes away 7 from

\frac{5}{2}

of the number, the result is

\frac{11}{2}

Set up the equation and solve it to find the unknown number in the following case:
Ibenhal thinks of a number. If she adds $19$ to it divides the sum by $5$ , she will get $8$ .

Q. Question 1(c)
Set up equations and solve them to find the unknown numbers in the following cases:
If I take three-fourth of a number and add 3 to it, I get 21.

Join BYJU'S Learning Program

Explore more

Solving an Equation

Standard VII Mathematics

Join BYJU'S Learning Program

Question 1(b) Set up equations and solve them to find the unknown numbers in the following cases: One - fifth of a number minus 4 gives 3.

Let the number be y. According to the question, y5−4=3 ⇒y5=3+4 ⇒y5=7⇒y=7×5 ⇒y=35

Question 1(b)
Set up equations and solve them to find the unknown numbers in the following cases:
One - fifth of a number minus 4 gives 3.

Let the number be y.
According to the question, $\frac{y}{5} - 4 = 3$
$\Rightarrow \frac{y}{5} = 3 + 4 \Rightarrow \frac{y}{5} = 7 \Rightarrow y = 7 \times 5 \Rightarrow y = 35$