B) X X 125 – X X 73 = 1196A) X X 15 + X X 13 = 560 X 45 X X ( 1...

Câu 2.

b) x x 125 – x x 73 = 1196

a) x x 15 + x x 13 = 560 x 45

x x ( 15 + 13 ) = 25200

x x ( 125 – 73 ) = 1196

x x 28 = 25200

x x 52 = 1196

x = 25200 : 28

x = 1196 : 52

x = 900

x = 23