Latest exam Aptitude Question SOLUTION: PLEASE HELP!!! I need help solving the following problems: 1. y=2x+7 y=5x+4 2. 3x-2y=0 x+y=-5 3. 4x+3y=-3 2x+y=-1 4. 2x-4y= 3.8 3x-y=17.7 solve all by usin