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7x=21
x=21/7
x=3
b) 4x=32-12
4x=20
x=20/4
x=5
c)3x=14-5
x=9/3
x=3
powinno być okej
X= 15+6=21
21:7=3
X=3
b) 4•x+12=32
X= 32-12=20
20:4=5
c) x : 3+5=14
X= 14-5=9
9•3= 27
No to tyle :3 xD