-2/3 or 1/5
x * 0.7 = 85%, solve for x
201.0619298
X - 0.25 = 162.29
solve for X
x/70 * 100 = 85%, solve for x
(x+y) squared divided by (x-y) negative squared to one
(x+y) squared divided by (x-y) squared to half
the test is 70 marks total, student A got 86% how many marks did he get
(x+y) squared divided by (x-y)
x+y squared divided by x-y
