Question

8 la puterea 5 totul la puterea 40 = 2 la puterea 30 *x

Answer 1

      
$(8^{5})^{40}= 2^{30*x} \\ 8^{5*40}= 2^{30*x} \\ ( 2^{3} )^{5*40}= 2^{30*x} \\ 2^{3*5*40}= 2^{30*x} \\ 3*5*40=30*x \\ 30x=600 \\ \\ x= \frac{600}{30} = 20$