Answer:
-2x-7y=-4
Step-by-step explanation:
We want to add the two expressions
[tex]\begin{aligned} 5x-9y &= 1 \\ -7x+2y &= -5 \end{aligned}[/tex]
First we add the Left Hand Sides and do the same to the Right Hand Sides. This gives us:
(5x-9y)+(-7x+2y)= 1 +( -5)
Open the brackets
5x-9y-7x+2y=1-5
Regroup like terms
5x-7x-9y+2y=-4
-2x-7y=-4
The result of adding the two given expressions is -2x-7y=-4.
