(√a+√b)/(√a+√b)²=1/(√a+√b)
(5x+1)/ (8x) + 3x
x=0.1 ... 0.5+1 / 0.8 + 0.3 = 0.925
x=-1/3 ... -5/3 + 1 / (-8/3) -1 = -2/3 *(-3/8) - 1 = 1/4 - 1 = -3/4
-9x-4y=-56
4y-9x=-88
-9x-4y=-56
-18x=-144
-9x-4y=-56
x=8
-9*8-4y=-56
x=8
-72-4y=-56
x=8
-4y=16
x=8
y=-4
x=8