Question

Tìm xA) 2.x-2³.3²=138

B) (6.x-34).7³=3.7⁴

Answer 1

2x - 2³.3² = 138

2x - 72 = 138

2x = 138 + 72

2x = 200

x = 200 ÷ 2

x = 100

( 6.x - 34 ).7³= 3.7⁴

( 6x - 34 ).343 = 7203

6x - 34 = 7203 ÷ 343

6x - 34 = 21

6x = 21 + 34

6x =  55

x = 55 ÷ 6

x = 55/6

Answer 2

a,2x-2³.3²=138

2x-72=138

2x=66

x=66:2

x=33

Vậy x=33

b,(6x-34).7³=3.7⁴

(6x-34).343=7203

6x-34=21

6x=21+34

6x=55

x=55:6

x=\(\frac{55}{6}\)

Vậy x=\(\frac{55}{6}\)