Toán Lớp 6: tìm xez, biết :
17 – (7-x) = -2
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Toán Lớp 6: tìm xez, biết :
17 – (7-x) = -2
Comments ( 2 )
17-(7-x)=-2
=>17-7+x=-2
=>10+x=-2
=>x=-2-10
=>x=-(2+10)
=x=-12
Vậy x=-12.
Giải đáp:
$17-(7-x)=(-2)$
$⇒ 7-x= 17-(-2)$
$⇒ 7-x= 17+2$
$⇒ 7-x=19$
$⇒ x= 7-19$
$⇒ x= -12$
$Vậy$ $x=-12$