Tìm x: x + 2 = 4 x × 3 = 12 x × 3 = 6 x - 3 = 12 5 + x = 52 - 25 x + 4 = 20 + 16 x × 4 = 20 + 8
Giải thích
x + 2 x x | = 4 = 4 – 2 = 2 | x × 3 x x | = 12 = 12 : 3 = 4 | x × 3 x x | = 6 = 6 : 3 = 2 | x – 3 x x | = 12 = 12 + 3 = 15 |
5 + x 5 + x x x | = 52 – 25 = 30 = 30 – 5 = 25 | x + 4 x + 4 x x | = 20 + 16 = 36 = 36 – 4 = 32 | x × 4 x × 4 x x | = 20 + 8 = 28 = 28 : 4 = 7 | 5 × x 5 × x x x | = 50 – 25 = 25 = 25 : 5 = 5 |