26-3.(x-5)=14. 7.(x-6)=4x+9

26-3.(x-5)=14. 7.(x-6)=4x+9

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  1. Đáp án:

     

    Giải thích các bước giải:

    $26-3(x-5)=14$

    $⇔3(x-5)=12$

    $⇔x-5=4$

    $⇔x=9$

    $7(x-6)=4x+9$

    $⇔7x-42=4x+9$

    $⇔7x-4x=9+42$

    $⇔3x=51$

    $⇔x=17$

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  2. `\text{Đáp án:}`

    `26`-`3`.(`x-5`)=`14`

    `=>` `3`.(`x-5`)=`26`-`14`

    `=>` `3`.(`x-5`)=`12`

    `=>` `x-5`=`12`:`3`

    `=>` `x-5`=`4`

    `=>` `x`=`4`+`5`

    `=>` `x`=`9`

    `\text{Vậy}` `x`=`9`

    `7`.(`x-6`)=`4x`+`9`

    `=>` `7x`-`42`=`4x`+`9`

    `=>` `7x`-`4x`=`9`+`42`

    `=>` `3x`=`51`

    `=>` `x`=`51`:`3`

    `=>` `x`=`17`

    `\text{Vậy}` `x`=`17`

    `\text{#Chúc bạn học tốt!}`

    Reply

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