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

$(9,1)$
The equations are in standard form. The coefficients of y are $\pm 1$, which makes y easy to eliminate by adding ... we use the elimination method. Add the equations: $2x=18\qquad$ ... and solve for x $x=9$ Now, back-substitute into one of the initial equations $x+y=10$ $9+y=10$ $y=1$ Form an ordered pair $(x,y)$ as the solution to the system $(9,1)$