x - 3 < 0,25 (5x - 11)
x - 3 < 1,25x - 2,75
-0,25x < 0,25 |: (-0,25)
x > -1
x + 1 - 2(x-1)/3 = 53
x + 1 - 2x-2 /3 = 53 |*3
3x + 3 - 6x - 6 = 159
-3x = 162 |: (-3)
x = 54
/-x-y=2
\2(3x+y)=4 |:2
/-x-y=2
\3x+y=2
+----------
2x=4 |:2
x=2
/-x-y=2
\x=2
/-2-y=2
\x=2
/y=-4
\x=2
4*mx²+c=v
4m+4x²+c=v
4x²=v-4m-c
x²=v-4m-c / 4
x=v-4m-c / 4 (całość pod pierwiastkiem)