Question

[Tri Pham]

1) tim so tu nhien x,biet

A)(x-35)-120=0

B)124+(118-x)=217

C)156-(x+61=82

2) tinh nham bang cach them vao o so nay.bớt di cua so hang kia cung mot so tjich hop 

Vi du:57+96=(57-4)+(96+4)=53+100=153

Hay tinh nham 35+98

46+29

3)tinh nham bang cay them vao so tru va so bi tru cung mot so thich hop

Vi du:135-98=(135+2)-(98+2)=137-100=37Hay tinh nham 321-96

1354-997

Answer 1

[Minh Ánh]

(x-35)-120=0

=>x-35    = 0+120

=>x-35=120

=>x=120+35

=>x=155

tíc mình nha