Toán Lớp 6: Tìm x:d)(55 – x). (2x – 44)=0 e) 2x-2 =16
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Toán Lớp 6: Tìm x:d)(55 – x). (2x – 44)=0 e) 2x-2 =16
Comments ( 2 )
(55-x)(2x-44)=0
=>[(55-x=0),(2x-44=0):}
=>[(x=55-0),(2x=0+44):}
=>[(x=55),(2x=44):}
=>[(x=55),(x=44:2):}
=>[(x=55),(x=22):}
Vậy x\in{22;55}
e)
2x-2=16
=>2x=16+2
=>2x=18
=>x=18:2
=>x=9
Vậy x=9