a, 457+(217-x)=589 b,96-3(x+1)=42 c,5.(x+35)=515 d,70-5(x-3)=45 e,10+2.x=4 mũ 5: 4 mũ 3

Question

a, 457+(217-x)=589
b,96-3(x+1)=42
c,5.(x+35)=515
d,70-5(x-3)=45
e,10+2.x=4 mũ 5: 4 mũ 3

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Abigail 2 tuần 2021-07-07T15:04:00+00:00 2 Answers 4 views 0

Answers ( )

    0
    2021-07-07T15:05:05+00:00

    Đáp án:

    bn tham khảo ko hiểu cứ nói nhé 

    Giải thích các bước giải:

    a) `457 + (217 – x) = 589`

    `=> 217 – x = 589 – 457`

    `=> 217 – x = 132`

    `=> x = 217 – 132`

    `=> x = 85`

    b) `96 – 3(x + 1) = 42`

    `=> 3(x + 1) = 96 – 42`

    `=> 3(x + 1) = 54`

    `=> x + 1 = 18`

    `=> x = 18 – 1 = 17`

    c) `5(x + 35) = 515`

    `=> x + 35 = 515 : 5`

    `=> x + 35 = 103`

    `=> x = 103 – 35 = 68`

    d) `70 – 5(x – 3) = 45`

    `=> 5(x – 3) = 70 – 45`

    `=> 5(x – 3) = 25`

    `=> x – 3 = 5`

    `=> x = 5 + 3 = 8`

    e) `10 + 2 . x = 4^5 : 4^3`

    `=> 10 + 2 . x = 4^2`

    `=> 2 . x = 4^2 – 10`

    `=> 2 . x = 6`

    `=> x = 3`

    `\text{HỌC TỐT. NOCOPY}`

    0
    2021-07-07T15:05:58+00:00

    `a, 457 + ( 217 – x ) = 589`

    `217 – x = 589 – 457`

    `217 – x = 132`

    `x = 217 – 132`

    `x = 85`

    `b, 96 – 3( x + 1 ) = 42`

    `3( x + 1 ) = 96 – 42`

    `3( x + 1 ) = 54`

    `x + 1 = 54 : 3`

    `x + 1 = 18`

    `x = 18 – 1`

    `x = 17`

    `c, 5 . ( x + 35 ) = 515`

    `x + 35 = 515 : 5`

    `x + 35 = 103`

    `x = 103 – 35`

    `x = 68`

    `d, 70 – 5(x-3) = 45`

    `5(x-3) = 70 – 45`

    `5(x-3) = 25`

    `x – 3 = 25 : 5`

    `x – 3 = 5`

    `x = 5 + 3`

    `x = 8`

    `e, 10 + 2x = 4^5 : 4^3`

    `10 + 2x = 16`

    `2x = 16 – 10`

    `2x = 6`

    `x = 3`.

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