Question

Tìm x:

a,(7.x-11)= 2^5 . 5^{2 .} 200

b,16 . 4^x = 32⁵ 

Answer 1

a) => 7 . x - 11 = -193

=> 7 . x = - 193 + 11

=> 7 . x = - 182

=> x = - 182 : 7

=> x = -26

Answer 2

a)(7x-11)=2⁵.5².200

(7x-11)=32.25.200

(7x-11)=160000

7x=160000+11

7x=160011

x=160011:7

x=160011/7

b)16.4^x=32⁵

2⁴.4^x=(2⁵)⁵

2⁴.4^x=2²⁵

4^x=2²⁵:2⁴

4^x=2²¹

(2²)^x=2²¹

2^2.x=2²¹

=>2.x=21

x=21:2

x=10,5

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