1=7-6x
7x+2-x=20
7x-3=21-x
równania
1-7 = -6x
-6 = -6x /:(-6)
x = 1
7x-x = 20-2
6x = 18 /:6
x = 3
7x+x = 21+3
8x = 24 /:8
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1=7-6x
1-7 = -6x
-6 = -6x /:(-6)
x = 1
7x+2-x=20
7x-x = 20-2
6x = 18 /:6
x = 3
7x-3=21-x
7x+x = 21+3
8x = 24 /:8
x = 3
6x=7-1
6x=6|:6
x=1
7x+2-x=20
6x=18|:6
x=3
7x-3=21-x
7x+x=21+3
8x=24|:8
x=3