Помогите решить задачи! ? Пж!? Номер 9,10,11 у всех а) и б) варианты. #9 а) (х÷49)×36=1332 б) 12×(х+9x)=1200 #10 a) 8y-3y+167=1207 b) x+2x-192=378
#11 a) 945÷a-20=15 b) 4410÷x+170=205
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