240:(x−5)=22×52−20240:(x-5)=22×52-20
⇔240:(x−5)=4×25−20⇔240:(x-5)=4×25-20
⇔240:(x−5)=80⇔240:(x-5)=80
⇔x−5=3⇔x-5=3
⇔x=8⇔x=8
Vậy x=8x=8
70:(x−3)=(34−1):4−1070:(x-3)=(34-1):4-10
⇔70:(x−3)=80:4−10⇔70:(x-3)=80:4-10
⇔70:(x−3)=10⇔70:(x-3)=10
⇔x−3=7⇔x-3=7
⇔x=10⇔x=10
Vậy x=10x=10 Chúc học tốt nha