Solve the systems given below using either substitution or elimination by addition. 1.x+y=2 2.x2y=7 3.xy=6 3x+y=0 x=y+4 y=2x 4.x+2y=2 5.2xy=2 6.3x+5y=2 4x+4y=5 4x+y=3 y=2x+3 7. There are 1525 total public libraries in New York and Wisconsin. NY has 151 more libraries than twice the number in WI. How many public libraries are in each state? a. Use the first sentence to write the first equation. b. Use the second sentence to write the second equation. Hint: replace \"more than\" with "added to.\" c. Substitute your answer from part b into the equation in part a and solve for WI. d. Substitute your answer in part c into either of your original equations to solve for NY. e. How many public libraries does each state have