Lấy ( 13 x 2 ) - 33.6 = 7.6 là số thứ nhất
Lấy ( 13 x 3 ) - 33.6 = 5.4 là số thứ hai
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gọi số thứ 1 là a
số thứ 2 là b
ta có
3a+2b=33,6
a+2b=26
a=(33,6-26):2=3,8
tk mk nha ban
Gọi số thứ nhất là a, số thứ hai là b
Theo bài ra ta có:
a + b = 13 (1)
3a + 2b = 33,6 (2)
Lấy (2) trừ (1), ta được:
3a + 2b - a - b = 33,6 - 13
2a + b = 20,6
Suy ra: a = 20,6 - 13 = 7,6
Đáp án là 7,6 bạn ạ. Chúc bạn học tốt nhé
STN 7,6
STH 5,4
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7,6 thề 10000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000.......................% luôn
