7z + 5 = 21
z + 5/7 = 3
z = 3 - 5/7
Assuming that you are solving for z...
subtract the 5/7 over to get the "Z" by itself. This would leave you with...
Now you need a common denominator so you can legally subtract the 3 and 5/7. Your common denomenator would be a 7 because the 3 has no denominator and the 7 is already there...So give the 3 a 7/7 to get 21/7 it would be useless to go higher than a 7...don't do more than you have to.
Now all you have to do is subtract.
See if you can reduce...which you can't, then circle your answer and there it is! Hope this helps...oh and don't forget to keep things in order...you are subtracting...and can't mess the order up.
Answer this Question
7th grade science - a textbook has 2,000 g mass/ 4,000 cm to the 3rd pwr what is...
statistics - this is a problem in my statistics class, and I am lost to me, it ...
7th grade math - My friend is in the 7th grade and broke his wrist so he cannot ...
10th grade - how can i make an easy working model in physics for class 10 ...
7th grade home ec - HELP
7th grade math - i was trying to work out the problem (1.00-x)50/15x. (x=.40g ...
English - I forgot to add the following sentences. Thank you. 1) When they came ...
7th grade - list 10 carees in home economics
7th grade - 10 careers in home economics the qualifications duties & salary
english - - Computers - English - Foreign Languages - Health - Home Economics - ...