by HallsofIvy » Wed Jan 29, 2020 3:48 pm
You can't solve that pair of equations. there is no solution! If you multiply the first equation, 3x- 8y= 10 by -7 you get -21x+ 56y= -70. Any x, y pair satisfying the first equation will make -21+ 56y equal to -70, not -84.