Answer:
$420/15 = 28/1
Step-by-step explanation:
You divide 420 by 15 which gives you 28, and you divide 15 by 15 which gives you one.
I think it's right but it could be wrong tho.
answer:
x=0 or x=4.732050807568877 or x=1.2679491924311228
300
0.028
divide 1.680/60
