Answer:
(1,3)
Step-by-step explanation:
You could try and multiply I believe so .
B) 9(a+b)+4 (3a+2b)=21a+17b
So basically you just want to find the LCM of the denominators shown, or 2 and 3.
So in this case, you could use the most inefficient method, or listing the multiples out:
2 : 2, 4, 6
3: 3, 6, 9
And as you can see, the first multiple that matches is 6. So your answer would be B, 6.
420/3 = 140 rubies
Since they use 20 rubies you would do the total amount of rubies by 20.
140/20 = 7
