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3x=-2
x=-2/3
lub
5-2x=0
2x=5
x=5/2
lub
4x+1=0
4x=-1
x=-1/4
b)2x+5=0
2x=-5
x=-5/2
lub
x+3=0
x=-3
lub
4-3x=0
3x=4
x=4/3
c)2x^2=0
x=0
lub
5-x=0
x=5
lub
7x+3=0
7x=-3
x=-3/7