２條數-0-幫幫手

不太明白問題...所以把所有我想到有可能的都寫出來吧

1-1)
1.5 + ( W / 8 ) = 12
W / 8 = 12 - 1.5
W = 10.5 × 8
W = 84

驗 :
1.5 + 84/8
=1.5 + 10.5
=12

1-2)
( 1.5 + W ) / 8 = 12
1.5 + W = 96
W = 94.5

驗:
( 1.5 + 94.5 ) / 8
=96 / 8
=12

－　－　－　－　題一完　－　－　－　－　

2-1)
100 + ( e / 4) =250
e / 4 = 250-100
e = 150 x 4
e = 600

驗 :
100 + (600 / 4 )
=100+150
=250

1-2)
(100 + e ) / 4 = 250
100 + e =250 x 4
e = 1000-100
e = 900

驗 :
( 100 + 900 ) / 4
=1000 / 4
=250

好完了XD"

1.5+W=12
W=12-5
=7
2.100+e=250
e=250-100
=150
希望可以幫你! ! !
如果錯，不要怪我!!! 我五年級only!!!