How do you solve #2.1x-5=7.7#?
3 Answers
Explanation:
so this is our equation
so we are meant to leave
add
then divide
round it to
Proper working shown below:-
Explanation:
first, you want to isolate
divide both sides by 2.1 to see what
A trick to get round the decimals giving you a problem
Explanation:
Multiply all of both sides by 10
Add 50 to both sides
Divide both sides by 21
If you round off the answer you end up with an imprecise solution.
ONLY ROUND OFF IF INSTRUCTED TO
So we need a precise solution that involves the least work thus we stick to the fraction format.
However, the structure adopted for the question is 1 decimal place so to cover ourselves we can write
The
ALWAYS STATE THE NUMBER OF DECIMAL PLACES ROUNDED TO