Question

7 times 36 = 21 times ?

help needed asap :)

Answer 1

Answer:

7*36=21*x

252=21x

x=12

Hope it helps!

Answer 2

Answer:

12

Step-by-step explanation:

Let x be the unknown number.

Method 1

$\implies \sf 7 \times 36 = 21 \times x$

$\implies \sf 252 = 21x$

$\implies \sf \dfrac{252}{21} = \dfrac{21x}{21}$

$\implies \sf 12=x$

$\implies \sf x=12$

Method 2 (using mental arithmetic)

$\implies \sf 7 \times 36 = 21 \times x$

As 7 and 21 are both multiples of 7, divide both sides by 7:

$\implies \sf 36=3x$

Divide both sides by 3:

$\implies \sf 12=x$

$\implies \sf x=12$