Tìm x: 35 – 5(x – 1) = 10.
Tìm x: 35 – 5(x – 1) = 10.
35 – 5(x – 1) = 10
5(x – 1) = 35 – 10
5(x – 1) = 25
x – 1 = 25 : 5
x – 1 = 5
x = 5 + 1
x = 6.