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2x=14
x=7
b) 2x-3-(3x-2)=3
5x=4
x= 4/5
c) 1-5x kreska ułamkowa 3 = 4x - 3 kreska ułamkowa 2 /*6
2*(1-5x) = 3*(4x-3)
2-10x = 12x-9
-22x = -11
x=1/2
a)3x-y=9
x+y=3
3x=9+y/:3
x+y=3
x=3+y
3+y+y=3
x=3+y
2y=3-3
x=3+0
y=0
x=3
y=0
b)y-x=4
3*(x+y)=24
y=4+x
3x+3y=24
y=4+x
3x+3*(4+x)=24
y=4+x
3x+12+3x=24
y=4+x
6x=12
y=4+2
x=2
y=6
x=2
5x-3x=10+4
2x=14 |:2
x=7