these are problems that can either be answered with a decimal or fraction, but the book only provides the fraction answer and i do decimal methods, so im worried i may have done something wrong...
numbers written like this: 1/2, 4/5
15. -2/3(6 - 2a)=6
multiply by -3/2
-6 from each side
divide each side by -2
the book says the answer is 15/2
-5 from each side..
divide each side by -5
the book doesnt give an answer, so i'm even more worried about its correctness, lol.
add 4 to each side
divide each side by -19
book doesnt provide an answer, and the sheer length of the decimal has me worried, lol
add 4m to each side
add 3 to each side
divide each side by 10...
the main thing im worried about here is that the teacher said between problem 17 and 22 there was 1 problem with 'all numbers' as an answer and 1 problem with 'no solutions' as an answer. i got the all numbers one, but the answers to all the others, unless i did something wrong, are
19. all numbers
so, 22 seems the most likely to have been the one i made a mistake in, due to the fact all the others have solid non-decimal answers.
thanks in advance