Question

a)7x-13=3^2.4

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Answer 1

Bài làm

a) 7x - 13 = 3² . 4

=> 7x - 13 = 9 . 4

=> 7x - 13 = 36

=> 7x        = 36 + 13

=> 7x        = 49

=>   x        = 49 : 7

=>   x        =  7

Vậy x = 7

# Học tốt #

Answer 2

7x - 13 = 3².4

7x - 13 = 9.4

7x - 14 = 36

7x = 36 + 14

7x = 49

x = 49 : 7

x = 7

Answer 3

\(7x-13=3^2.4\)

\(7x-13=36\)

\(7x=36+13\)

\(7x=49\)

\(x=49:7\)

\(x=7\)

Answer 4

7x-13=3^2.4

7x-13=9.4

7x-13=36

7x=36+13

7x=49

x=49:7

x=7

Answer 5

7x-13=9.4

7x-13=36

7x=36+13

7x=49

x=49:7

x=7

Vậy x=7