GIÚP MÌNH NHA! a) 50-36:x=32 b)102-2x(x-1)=100

GIÚP MÌNH NHA!
a) 50-36:x=32
b)102-2x(x-1)=100

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  1. a) `50-36÷x=32`

    `⇒ 36÷x=50-32=18`

    `⇒ x=36/18=2`

    b) `102-2x(x-1)=100`

    `⇒ 2x(x-1)=102-100=2`

    `⇒ x(x-1)=2÷2=1`

    `⇒ x²-x=1`

    `⇒ x=∅`

     

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