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26*х=52                78:х=3                х*17=51               х:240=4
х=52:26                х=78:3                х=51:17                х=240*4
х=2                       х=26                    х=3                       х=960
26*2=52                 26*3=78             3*17=51                960:240=4
 52=52                  78=78                  51=51                   4=4

X= 52 : 26
X=1.x=52:26
X=2
2.x=78:3
X=26
3.x=51:17
X=3
4.x=2404
X=960