math
posted by Sara! on .
how do you solve these problems?
1.2x/3 + 1/3  x/8= 2/3
2. 3n + 9/10 + n/5= 2 3/10
3. 3k/4  28  2k/3 = 37
thank you can you please show me step by step how you got the answer?

I will do one for you, and you try the other two
2.
3n + 9/10 + n/5= 2 3/10
3n + 9/10 + n/5= 23/10
looks like 10 is the lowest common denominator, so multiply each term by 10
30n + 9 + 2n = 23
32n =  23  9
32n =  32
n = 1
hint: for the first, multiply each term by 24
for the third, multiply each term by 12 
i got for # 3 8/13 and plugged in the number for the letters and got it wrong. what is the correct way to solve it thank you

#3
3k/4  28  2k/3 = 37
times 12
9k  336  8k = 444
k = 444+336
k = 780
check:
Left side = 3(780)/4  28  2(780)/3
= 585  28  520
= 37
= right side
My answer is correct, how did you get 8/13 ?