The pair of equations x+y=0 and x+y=-7 has how many solutions? Share with your friends Share 0 Siddigan answered this here A=1, a=1, B=1, b=1, C=0, c=-7 it is in the form of A/a =B/b not equal to C/ctherefore , it has no zeroes. ( lines are parallel in graph ) 3 View Full Answer