Question

Bài 2.Tìm x

a,10+2x=4^5:4^3

b,14x+54=82

c,15x-133=17

Answer 1

a) \(10+2x=4^5:4^3\)

\(\Leftrightarrow10+2x=4^2\)

\(\Leftrightarrow2x=6\)

\(\Leftrightarrow x=3\)

b) \(14x+54=82\)

\(\Leftrightarrow14x=28\)

\(\Leftrightarrow x=2\)

c) \(15x-133=17\)

\(\Leftrightarrow15x=150\)

\(\Leftrightarrow x=10\)

Answer 2

a) 10 + 2x = 4^5 : 4^3

=> 10 + 2x = 4^2

=> 2x = 6

=> x = 3

b) 14x + 54 = 82

=> 14x = 28

=> x = 2

c) 15x - 133 = 17

=> 15x = 150

=> x = 10

Mỗi câu bạn tính xong x bạn thêm chữ vậy x =... vào nha

Answer 3

\(a,10+2x=4^5:4^3\)

\(\Rightarrow10+2x=4^2\)

\(\Rightarrow10+2x=16\)

\(\Rightarrow2x=16-10\)

\(\Rightarrow2x=6\)

\(\Rightarrow x=6:2\)

\(\Rightarrow x=3\)

\(b,14x+54=82\)

\(\Rightarrow14x=82-54\)

\(\Rightarrow14x=28\)

\(\Rightarrow x=28:14\)

\(\Rightarrow x=2\)

\(c,15x-133=17\)

\(\Rightarrow15x=133+17\)

\(\Rightarrow15x=150\)

\(\Rightarrow x=150:15\)

\(\Rightarrow x=10\)