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le ra phai la ngoac vuong o trong
ngoac nhon o ngoai chu
chuc bn hoc gioi!
nhae@
nham bai nhu the nay ne
5 * [ 225 - ( x - 10 ) ]- 125 = 0
ukm mk giai day
5*[225-(x-10)]-125=0
5*[225-(x-10)] =0+125
5*[225-(x-10)] =125
[225-(x-10)] =125:5
[225-(x-10)] =25
x-10 =225-25
x-10 =200
x=200+10
x=210
chuc bn hoc gioi!@
5[225-{x-10}]-125=0
5[225-(x-10)]=125
225-(x-10)=5
x-10=220
x=210
5*[225-{x-10}]=0+125
5*[225-{x-10}=125
225-{x-10}=125:5
225-{x-10}=25
x-10=225-25
x-10=200
x =200+10
x =210