Question

What is the value of x in this simplified expression 7^-9x 7^-3=7^x

Answer 1

x = -12

Explanation:

`{7}^( - 9) * {7}^( - 3) = {7}^(x)`

the base is equal so we can add the number above

`{7}^( - 9 + ( - 3)) = {7}^(x)`

`{7}^( - 12) = {7}^(x)`

the base is equal so is the number above

-12 = x