Question

Giúp huhu

Answer 1

=>100x+5050=5750

=>100x=700

=>x=7

Answer 2

=>x+1+x+2+x+3+........+x+100=5750

=>x.100+(1+2+3+....+100)=5750

=>x.100+\(\left(\dfrac{\left(100+1\right).\left[\left(100-1\right):1+1\right]}{2}\right)\)

=>x.100+5050=5750

=>x.100=700

=>x=7