a x 4 + 35 + a x 6 = a x 5 + a x 10
a x (4 + 6) + 35 = a x (5 + 10)
=> a x 10 + 35 = a x 15
=> 35 = a x 15 - a x 10
=> 35 = a x (15 - 10)
=> 35 = a x 5
=> a = 35 : 5
=> a = 7
mink van tkay vô lý. toan lop 3 mà mẹo ghê nka
Ta có: 4a + 35 + 6a = 5a + 10a
<=> 10a + 35 = 15a
=> 35 = 15a - 10a
=> 35 = 5a
=> a = 35 : 5
=> a = 7