Question

If21 is added to a number, the result is 7 less than 3 times the number Find
the number.
(a) 14
(b) 12
(c) 15
(d) 18​

Answer 1

Answer:

a)14

Let x be the required number so now lets add 21

therefore the result is 21+x.

the result is 7 less than 3 times x so 3x-7 is result.

Equating both

3x-7=21+x

2x=28

x=14

Therfore the answer is 14.

Hope this helps

:D.