His model is incorrect because 20 x 7 is not 14, it is 140. If he had 140 instead of 14, he would have been correct.
I haven't done division like that in a long time, so this is what I think it will look like. I didn't add other work (multiplying 4 with #'s) but you can if you have to
1.4375
<u>Step-by-step explanation:</u>
Step 1:
Let the given equation be
To find X simplification of terms using BODMAS ( Brackets Orders Division Multiplication Addition Subtraction) is done as follows.
Step 2:
Let us expand the equation as
Step 3:
Let us expand it further as
Step 4:
To find X segregate X in one side and all other remaining terms in other side as follows
After the simplification the numerical value is
Step 5:
Keep X along one side and bring 48 to the denominator of another side to find X as follows
And the value of X is 1.4375
