4 3/5+6 2/5-х=2 1/5+4 4/5
23/5+12/5-х=2/5+16/5
7-х=18/5
-х=18/5-7
-х= -17/5 |• (-1)
х=17/5
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Решение1) 2 1/5+4 4/5=7
4 3/5+6 2/5-×=7
Решение2) 4 3/5+6 2/5-×=11
11-×=7
×=11-7
×=4
4 3/5+6 2/5-х=2 1/5+4 4/5
23/5+12/5-х=2/5+16/5
7-х=18/5
-х=18/5-7
-х= -17/5 |• (-1)
х=17/5