(x+2988)x2-1567 =4435
(x+2988)x2=4435+1567
(x+2988)x2=6002
x+2988=6002:2
x+2988=3001
x=3001-2988
x=13
(x + 2988) x 2 - 1567 = 4435
(4435+1567):2=x+2988
6002:2=x+2988
3001=x+2988
x=3001-2988
x=13
(x + 2988) x 2 - 1567 = 4435
(4435+1567):2=x+2988
6002:2=x+2988
3001=x+2988
x=3001-2988
x=13
(x + 2988) x 2 - 1567 = 4435
(x + 2988) x 2 = 4435 + 1567
(x + 2988) x 2 = 6002
(x + 2988) = 6002 : 2
(x + 2988) = 3001
x = 3001 - 2988
x = 13
1.Tìm …….. biết : (…………. + 2988 ) × 2 – 1567 = 4435
2457 + ………. = 85 × 9 × 6 ………. – 2649 = 35 × 7 × 8
…… : 7 = 1049 dư 5