Răspuns :

Răspuns:

12

Explicație pas cu pas:

[(7/9)^x]^4×(7/9)^6=(7/9)^53×7/9​

(7/9)^4x ×(7/9)^6=(7/9)^53×7/9​

(7/9)^4x ×(7/9)^6=(7/9)^53+1

(7/9)^4x ×(7/9)^6=(7/9)^54

(7/9)^4x+6=(7/9)^54

4x + 6=54

4x=54-6

4x = 48

x=48/4

x=12

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