Question

Grace thought of a number, added 7, multiplied by 3, took away 5 and divided by 4 to give an answer of 7.

Answer 1

Answer:

The number Grace took was 4.

Step-by-step explanation:

Let us assume that she took a number 'x'

Now she added 7 in it, $x+7$

Then multiplied by 3 ,  $3(x+7)$ = $3x+21$

Then took away or subtracted 5.

$3x+21-5=3x+16$

And divided by 4 to get answer 7.

$\frac{3x+16}{4}=7$

Now we will solve this to get x.

$3x+16=28$

$=> 3x=28-16$

$=> 3x=12$

x = 4

Hence, the number Grace took was 4.

Answer 2

7 * 4 = 28
28 + 5 = 33
33 / 3 = 11
11 - 7 = 4

The number she thought of is 4