33-6+9
30
x2+6x+9=0
(-3,-3)
T-19=2
T=21
3(x+4)
3x+12
4(x-2)=12
x=5
9+22+18
31
x2-9x+14=0
(2,7)
8y=48
y=6
-2(x-3)
-2x+6
c+5(3)=20
c=5
72-5+39
83
x2+5x+6=0
(-2,-3)
6y-5=7
y=2
5(2a-4b)
10a-20b
5(x-4)=30
x=10