10х - 43 = 2 + 3
10х - 43 = 5
10х = 5 + 43
10х = 48
х = 48 : 10
проверка:
10 * 4,8 - 43 = 2 + 3
48 - 43 = 5
5 = 5
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10х - 43 = 2 + 3
10х - 43 = 5
10х = 5 + 43
10х = 48
х = 48 : 10
х = 4,8
проверка:
10 * 4,8 - 43 = 2 + 3
48 - 43 = 5
5 = 5