Question

помогите решить уравнение (71-x):4-9=6

Answer 1

(71-х) : 4 - 9 = 6
(71-х) / 4 = 6+9
(71-х)=15*4
71-х=60
-х=60-71
-х= -11
х=11
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проверка
(71-11) : 4 - 9 = 6
60/4 -9 = 6
15-9 = 6
6=6