## Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)

$y$ is isolated in eq. $1.$ $y=2x-3\qquad$ (*) Replace $y$ with $2x-3$ in the other equation: $(2x-3)-2x=1\qquad$ ... and solve for $x$. $2x-2x=1+3$ $0=4\qquad$ ... a contradiction, the system has no solution.