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x=4
2. 20=5z
20/:5
z=4
3. 4y+1=25
4y=25-1
4y=24/:4
y=4
4. 33=3k+3
3k=3-33
3k= -30/:3
k= -10
5. 7z+8= 4z+14
7z=4z+14-8
7z-4z=14-8
3z=6/:3
z=2
6. 2w+11= 3w+4
2w=3w+4-11
2w-3w=4-11
w=7
:):):):)