1. Four times a number, x, plus five times a number, y, equals 79. Ten times x minus 5 times y equals 5. Find the numbers by setting up a system of linear equations and solving the system using the elimination method.
x = 7, y = 9
x = 6, y = 11
x = 8, y= 10
x = -10, y = 7
2. Kayla has saved $350 in 5 months. Express her rate of savings as a unit rate.
$140 every 2 months
$75 every month
$70 every month
$350 every 5 months