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24=21x /:21
x= 24/21
7/6 = 3 (x+2)/4 /*24
28=18 (x+2)
28= 18x+ 36 /-36
8=18x
x= 8/18
4/7=3(x+2)/6 /*42
24= 21 (x+2)
24=21x+42 / -42
-18= 21x
x= - 18/21
4/7 = 3x+2/6 3x+2 to całe wyrażenie jest podzielone przez 6? /*42
24= 7(3x+2)
24=21x+14 /-14
10= 21x
x= 10/21