Question

Si cd + dc = 165, además c = d+3. Halle c y d

Answer 1

Respuesta:

C = 9; D = 6

Explicación paso a paso:

cd + dc = 165

10c + d + 10d + c = 165

11c + 11d = 165

11 ( c + d ) = 165

11 [(d + 3) + d) = 165

2d + 3 = 15

2d = 12

d = 6

Del dato:

c = d + 3

c = 6 + 3

c = 9