5(3x-1)
(x-3)(x-2)
I don't know if you want working out or an explanation? Or if it's too late, sorry.
28÷1.5=18.67
meaning that more, than 17 discs can be placed in the box.
The answer to your question is 16 and 5/12
Triangle has 180 degree in total, in order to get x, you use 180-70-75=35
2nd subtraction property.
