Respuesta :
9) m - 17 = - 8
add 17 to each side
m = 9
10) k - 55 = 67
add 55 to each side
k = 122
11) -44 + n = 36
add 44 to each side
n = 80
add 17 to each side
m = 9
10) k - 55 = 67
add 55 to each side
k = 122
11) -44 + n = 36
add 44 to each side
n = 80