Select all the equations that only have one solution ( asap )

What is the solution of the systems of equations? y=2/3x+3 x=-2

When keisha installed a fence along the 200 foot perimeter of her rectangular back yard, she left an opening for a gate.in the diagram below, she used x to represent the length in feet of the gate? what is the value? a. 10 b. 20 c. 25 d. 30

Two angles are complementary. the larger angle is 36 more than the smaller angle. what is the measure of the larger angle?