Question

20+2.(x+3)=5mu2.4

(2x-6)=2.5mu4:5mu3

Answer 1

20 + 2.(x + 3) = 5² . 4

20 + 2.(x + 3) = 25 . 4

20 + 2.(x + 3) = 100

        2.(x + 3) = 100 - 20

        2.(x + 3) = 80

             x + 3 = 80 : 2

             x + 3 = 40

                   x = 40 - 3

                   x = 36

(2x - 6) = 2.5⁴ : 5³

(2x - 6) = 2.625 : 125

(2x - 6) = 1250 : 125

(2x - 6) = 10

       2x = 10 + 6

       2x = 16

         x = 16 : 2 = 8