Предмет: Математика, автор: oksak

помогите решить уравнение
1) 3,2a + 1,1 = 7,5
2) 7,1x + 4,2x + 0,2 = 11,5
3) 14 + 6,2y + 2,4y = 69,9

Ответы

Автор ответа: стасанчик
1
1)3,2a=7.5-1.1
  3.2a=6.4
  a=6.4/3.2
  a=2
2)7.1x+4.2x+0.2=11.5
   11.3x=11.5-0.2
   11.3x=11.3
    x=11.3/11.3
    x=1
3)8.6y=55.9
   y=55.9/8.6
   y=6.5
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