A. Xx285+115xX=400 B.25xX-X=14040:45 C.X-108x42=2378 ...
Đọc tiếp
A. Xx285+115xX=400 B.25xX-X=14040:45 C.X-108x42=2378 D.1337+13xX=6745
A x = 400 : ( 285 + 115)
x = 400 : 400
x= 1
B, x = (7745 - 1337) : 13
x = 5408 : 13
x= 416
C. x = 2378 +( 1048 x 42)
x = 2378 + 4536
x = 6914
D. 25 x X - X = 312
= 25X - X = 312
= 24X= 312
X= 312 : 24
X= 13