Solving the systems of equations by elimination-solo team teach

x+y=-7
3x+y=-9

x= -1, y= -6

step-by-step explanation:

through just a quick inspection, one can see that the graph of this cubing function starts in quadrant iii and ends in quadrant i.   when x = 0, y = 3, so the y-intercept is (0, 3).

if graphs are part of the problem statement, share them.   .

expression #3 is not equivalent. the others are.