Answer:
[tex]12y=-7[/tex]
Step-by-step explanation:
Algebra and Equations
When two or more equations are explicitly given, we can perform operations like addition, subtraction, product, and division with them, the left-hand sides of each equation apart from the right-hand sides. The resulting equation will not be independent of the others but may result in handy to solve the system.
We are given these two equations
[tex]2x+7y=-8[/tex]
[tex]2x-5y=-1[/tex]
If we wanted to subtract the second equation from the first, we must do the following
[tex]2x+7y-(2x-5y)=-8-(-1)[/tex]
[tex]2x+7y-2x+5y=-8+1[/tex]
Simplifying (the x's will cancel)
[tex]12y=-7[/tex]
