Question

2(r-1)=12 solucion por favor

Answer 1

Respuesta:

$2(r - 1 )= 12 \\ 2r - 2 = 12 \\ 2r = 12 + 2 \\ 2r = 14 \\ \frac{2r}{2} = \frac{14}{2} \\ r = \frac{14}{2} \\ r = 7$