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