x + 25%x = 1,25 x – 75%x =7/4 2/7 =-0,75

Question

x + 25%x = 1,25
x – 75%x =7/4
2/7 =-0,75

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Thanh Thu 4 years 2021-04-28T18:47:18+00:00 2 Answers 10 views 0

Answers ( )

  1. lethu
    0
    2021-04-28T18:48:50+00:00
    Reply

    x + 25%x = 1,25

    x+$\frac{1}{4}$x =1$\frac{1}{4}$

    x+(1+$\frac{1}{4}$)=1$\frac{1}{4}$

    =>x=0

    x – 75%x =7/4

    x-$\frac{3}{4}$ x=$\frac{7}{4}$

    x-(1-$\frac{3}{4}$)=$\frac{7}{4}$

    x-$\frac{1}{4}$=$\frac{7}{4}$

    x=$\frac{7}{4}$+$\frac{1}{4}$

    x=2

     

  2. phucdien
    0
    2021-04-28T18:49:03+00:00
    Reply

    a)x+25%=1.25

    ⇒x+0.25=1.25

    ⇒x=1.25-0.25

    ⇒x=1

    b)x-75%=7/4

    ⇒x-3/4=7/4

    ⇒x=7/4+3/4

    ⇒x=5/2

    c)đề sai bạn nhé

    Chúc bạn học tốt

     

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )