Answer:
There is no solution for this set of equations.
The sum of two numbers can not have two different solutions.
Answer: x=5 y=6
Step-by-step explanation: 6y=3× +21
6y-6=2× +20
Opposite sides of the rectangle are equal
Substitute 3x +21 into 6y in the second equation.
156 dollars because 13 times 12 (months)
equals 156