Как решить уравнения? Решите эти уравнения: 150-x:2=140 ,
(150-x):2=65 , (300-18)*x=1410 , 5*x-600=900 ,
300-x*5=210 , (300-x)*5=210 , (150-20):x=65 , (x+4)*7=350
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