Respuesta :
Let call the number we are searching for x. 2*x + 17 = -1 so 2*x = -1-17 = -18 and x = -18/2 = -9
let the number x
2x +17=-1
collect like term
2x=-1 -17
2x = -18
divide through by 2
2x/2 =-18/2
x=-9
