Toán Lớp 6: Mn giúp em với ạ
(-300):20+5.(3x-1)=25
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Toán Lớp 6: Mn giúp em với ạ
(-300):20+5.(3x-1)=25
Em cảm ơn
Comments ( 2 )
Giải đáp:
(-300):20+5.(3x-1)=25
(−15)+5(3x−1)=25
5(3x−1)=25-(-15)
5(3x−1)=40
3x−1=40:5
3x−1=8
3x=8+1
3x=9
x=9:3
x=3
(-300):20+5.(3x-1)=25
-15+5.(3x-1)=25
5.(3x-1)=25-(-15)
5.(3x-1)=40
3x-1=40:5
3x-1=8
3x=8+1
3x=9
x=9:3
x=3
Vậy x=3