Use the property of substitution to solve:
2 ( x - 2y = 15) ... 2x - 4y = 30
2x + 4y = -18
subtract..... 4x = 12
divide by 4 x =3 place into original equation 3 - 2y = 15
-2y = 12
y = -6
(3, -6)
Answer:
The system has just one solution, it is (1,4).
Step-by-step explanation:
When we have a system of linear equations, the solution is given by the intersection point of the two lines.
So if we see the graph, the intersect point is at (1,4). Therefore, the system has a unique solution.
I hope it helps you!
Collect like terms:
4r^2 + (-2 + 6)
Simplify:
4r^2 + 4
DONE !!
