Question

(8 la puterea 5)la puterea 40=2la puterea30xX

Answer 1

$\it (8^5)^{40}=2^{30x} \Rightarrow 8^{5\cdot40}=2^{3\cdot10x} \Rightarrow 8^{200}=8^{10x} \Rightarrow 10x=200 \Rightarrow x=20$