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2-3x:(1-2x) = -1/2 / *(1-2x)
2-3x+1-2x = 1-2x/2 / *2
4-6x+2-4x=1-2x
-10x+2x=-6+1
-8x=-5
x=5/8
/ + kreska ułamkowa ;)
52.
x+3y=5
2x-y=3
-x-3y=-5
2x-y=3
x=4y-2
8y-4-y=3
7y=7
y=1
x=4-2
x=2
y=1