Ответ:
5-y 3
----- = -----
4 7
(5–y)×7=4×3
35–7y=12
-7y=12-35
y= –7÷(-23)
y=23 2
---- или 3 ---
7 7
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Ответ:
5-y 3
----- = -----
4 7
(5–y)×7=4×3
35–7y=12
-7y=12-35
y= –7÷(-23)
y=23 2
---- или 3 ---
7 7