Question

Need help solving #8

Answer 1

Answer:

7)$2^x=2^8x-15$

Apply exponents rules

$x=8x-15$

Solve $x=8x-15: x=\frac{15}{7}$

Answer: $x=\frac{15}{7}$

8)$4^x=2^x+1\\2x=x+1\\x=1$

Answer : $x=1$

9)$5^x+3=7^x\\(x+3) in (5)=xln(7)\\x=\frac{3ln(5)}{in(7)-in(5)}$

Answer: $x=\frac{3ln(5)}{in(7) -in(5)}$

Step-by-step explanation:  

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