Answer :
high temperature : x
low temperature: x-124
x+(x-124)=72
2x-124=72
2x=196
x=98
98-124= -26
Low temperature of this city is -26 degree
low temperature: x-124
x+(x-124)=72
2x-124=72
2x=196
x=98
98-124= -26
Low temperature of this city is -26 degree