How to solve the equation of (30% + 2) / (20 + x) = 22%?

How to solve the equation of (30% + 2) / (20 + x) = 22%?

（30％+2）÷（20+x）=22％ 2+0.3x=0.22(20+x)
2+0.3x=4.4+0.22x
0.3x-0.22x=4.4-2
0.08x=2.4
x=2.4/0.08
x=30

How to solve (20 * 10% + 30% x) / (20 + x) = 22%

(20*10%+30%x)/(20+x)=22%
2+0.3x=0.22(20+x)
2+0.3x=4.4+0.22x
0.3x-0.22x=4.4-2
0.08x=2.4
x=2.4÷0.08
x=30

The sum of 1.2 times of a number and 30% of it is 45. Find the number (by solving the equation)
Brother and sister, who can help me do it````
1.2X+30%X=45
1.2X+0.3X=45
1.5X=45
X=30
Why is it wrong for me to put in generations?

1.2X+30%X=45
1.2X+0.3X=45
1.5X=45
X=30
1.2*30=36,30%*30=9
36+9=45
Is there anything wrong with that?

There is a basket of fish with a total weight of 122kg. When half of the fish is sold and the remaining half is sold, the fish with a total weight of 34kg

Fish weight x, basket weight y
x+y=122
x/4+y=34
x=352/3