2x + 5y = -7; x= -6

3x - 6y = -9; y =3

Solve for x: y=-x - 6; y=2x-3

The maple tree that is 20 inches tall is growing 4 inches per month, whereas the oak tree that is 26 inches tall is growing 3 inches per month.

3x - 2y= 5; y=-1

Two road crews are paving a straight section of highway. The first crew has completed paving 81 miles and is completing 2 additional miles per day. The second crew has only finished 77 miles but is covering 3 miles per day.

Mr. Gilmore is contemplating which chauffeured car service to take to the airport. The first costs $10 up front and $2 per kilometer. The second costs $13 plus $1 per kilometer.

Solve for x: 4x + 6y=3x + 4

6x + 6y = 6; x=7

solve for y: 10x - 10y=3x +4

x - 8y= -12; y=2

-4x - y = 1; y=-5