Intermediate Algebra for College Students (7th Edition)

To solve the given problem we will have to plug the simplest equation into the other equation and then solve for the other variable. As we are given that $x-2y=4$ or, $x=2y+4$ Now, $2(2y+4)-4y=5$ or, $4y+8-4y=5$ or, $8 \neq 5$ Hence, No solution.