Question

PLEASE ANYONE HELP.
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Answer 1

Answer:

Step-by-step explanation:

equation (1) = 7ˣ + 5^ y = 74

let 7ˣ =a and 5^y = b

                   a+b=74

equation(2) = 7ˣ x 7 - 5^y x 5 =218

             7a - 5b = 218

now solve (1) and (2)

(1) x 5 = 5a+5b=370

(2) x 1= 7a - 5b = 218

   = 12a = 588

   = a=588/12

   = a= 49

now sub a= 49 in(1)

49+b=74

b= 74-49

b=25

now 7ˣ=49

      7ˣ = 7²

now x=2

then 5^y=25

    5^y = 5²

            y=2