b) -3x+2=0
-3x=-2 ·(-1)
x=2/3
c) -9x+18=0
-9x=-18 ·(-1)
x=18/9
x=2
d) 5x-20=0
5x=20
x=20/5
x=4
e) √5 x+√20=0
√5x=-√20
x=-√20/√5
x=-4
f) 3x-√2 +1=0
3x=√2-1
x=(√2-1)/3
g) √2 x - √18 +2√2=0
√2x-3√2+2√2=0
√2x-√2=0
√2(x-1)=0
x-1=0
x=1
h) (5-√7)x-5-√7=0
(5-√7)(x-1)=0
x-1=0
x=1
i) x√2 - √3 =0
√2x=√3
x=√3/2
