Question

Tim x :

14x-2.7²=2.3.7

9x+2.3²=3⁴

10x+2^2.5=10²

Luu y: ko duoc su dung so am !

moi nguoi hay giup minh nha !

cam on

Answer 1

a) 14x - 2.7² = 2.3.7

2.7.(x - 7) = 2.7.3

x - 7 = 3

x = 3 + 7 = 10

b) 9x + 2.3² = 3⁴

3²x + 2.3² = 3².3²

3².(x + 2) = 3².3²

x + 2 = 3²

x = 3² - 2

x = 7

c) 10x + 2².5 = 10²

10(x + 2) = 10.10

x + 2 = 10

x = 10 - 2

x = 8

Answer 2

Kb với mình nha!!!

Answer 3

14x - 2.7² = 2.3.7

=> 14x = 42 + 98

=> 14x = 140

=> x = 10

9x+ 2.3²=3⁴

=> 9x = 81 - 18

=> 9x = 63

=> x = 7

10x + 2² .5 = 10²

=> 10x = 100 - 20

=> 10x = 80

=> x = 8

Tíc mình nhé! :")

Answer 4

Bất công quá!!!!!!!!!!!!!