\(\left(\dfrac{1}{3}+\dfrac{1}{5}-\dfrac{1}{7}\right)=\dfrac{1}{7}-\dfrac{1}{3}\) nha
`x-(1/3 + 1/5 - 1/7) = 1/7- 1/3`
`=>x-( 8/15 - 1/7) = 1/7- 1/3`
`=>x-41/105=1/7- 1/3`
`=>x-41/105=-4/21`
`=>x= -4/21 + 41/105`
`=>x=1/5`
x−(13+15−17)=17−13x-(13+15-17)=17-13
⇒x−(815−17) =17−13⇒x-(815-17) =17-13
⇒x−41105=17−13⇒x-41105=17-13
⇒x−41105=−421⇒x-41105=-421
⇒x=−421+41105⇒x=-421+41105
⇒x=15
x−(13+15−17)=17−13x-(13+15-17)=17-13
⇒x−(815−17) =17−13⇒x-(815-17) =17-13
⇒x−41105=17−13⇒x-41105=17-13
⇒x−41105=−421⇒x-41105=-421
⇒x=−421+41105⇒x=-421+41105
⇒x=15
