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x=3
b) 3x-x=-3+15
x=12
c) 4x+4=6x
4=6x-4x
4=2x /:2
2=x czyli x=2
d) x/5+3=5 / *5
x+15=25
x=25-15
x=10
x=3
b) 3x-x=-3+15
x=12
c) 4x+4=6x
4=6x-4x
4=2x /:2
2=x czyli x=2
d) x/5+3=5 / *5
x+15=25
x=25-15
x=10
x=3
b) 3x-x=-3+15
x=12
c) 4x+4=6x
4=6x-4x
4=2x /:2
2=x czyli x=2
d) x/5+3=5 / *5
x+15=25
x=25-15
x=10