write 84 as a product of prime factors
subtract the quotient of p divided by 3q from the cube of r
-a-c =0
b+c = -1
2a-b+c+d =0
-b-3c-d = 4
625/1250
18=10+(36−10)e −0.1t
divide the sum of 3z and 7x by 5a
2 2/3 x 5 as a fraction in its simplest form
add 9z to the product of 3x and 7y