6.72 :202 — х=13х+8х-0.03=01

 6.72 :(203.2 -х)=2.1
1.3х+3.8х-0.03=2.01

  • I) 1.3х + 3.8х-0.03=2.01 

    1.3х + 3.8х = 2.01 + 0.03
    5.1х = 2.04
    х = 2.04/5.1
    х = 0.4
    Проверка:
    5.1 * 0.4 = 2.04
    2.04 = 2.04
    Ответ: х=0.4

    II) 

    6.72/(203.2 -х)=2.1

    203.2 — x = 6.72/2.1
    203.2 — х = 3.2 
    х = 203.2 — 3.2
    х = 200
    Проверка:
    6.72/(203.2 — 200) = 2.1
    6.72/3.2 = 2.1
    2.1 = 2.1
    Ответ: х=200