x + 600 x2 = 1000 x 10
x + 1200 = 10 000
x = 10 00 - 1200
x = 8 800
x + 600 x 2 = 1000 x 10
x + 1200 = 10 000
x = 10 000 - 1200
x = 8 800
x + 600 x 2 = 10000
x + 1200 = 10000
x = 10000 - 1200
x = 8800
nha bn
x + 600 x 2 = 1000 x 10
x + 600 x 2 = 10000
x + 600 = 10000 : 2
x + 600 = 5000
x = 5000 - 600
x = 4400
x+600x2=10 000
x+1200=10 000
x=10 000-1200
x=8800