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3x=10-7
3x=3/:3
x=1
B).4x-2=7x-1
4x-7x=-1+2
-3x=1/:(-3)
x=-1/3 (ułamek)
C).8(x-1)=10
8x-8=10
8x=10+8
8x=18/:8
x=18/8=2.2/8= 2.1/4 (ułamek)
D).5x-1/2=8
5x-0,5=8/*10
50x-5=80
50x=80+5
50x=85/:50
x=1,6
E).4(x-2)=8(x-3)
4x-8=8x-24
4x-8x=-24+8
-4x=(-16)/:(-4)
x=4