Вопрос школьника по предмету Математика
решите уравнение . (х-18,2)+3,8 =15,6
34,2-(17,9-у)=22
16-(f+3?4)=4
r+16?23-15?8=7
Ответ учителя по предмету Математика
а) (х-18, 2)+3, 8=15,6
х-18,2+3,8=15,6
х=15,6+18,2-3,8
х=30
б) 34,2-(17,9-у) =22
34,2-17,9+у=22
у=22-34,2+17,9
у=5,7
в) 16,5-(т+3,4)=4,9
16,5-т-3,4=4,9
-т=4,9-16,5+3,4
-т=-8,2
т=8,2
г) р+16,23-15.8=7,1
р+0,43=7,1
р=7,1-0,43
р=6.67
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