I believe the answer is S. <span />
Answer:
A
Step-by-step explanation:
Given the 2 equations
4x + 5y = - 12 → (1)
- 2x + 3y = - 16 → (2)
Eliminate the x- term by multiplying (2) by 2 and adding the result to (1)
- 4x + 6y = - 32 → (3)
Add (1) and (3) term by term
11y = - 44 ( divide both sides by 11 )
y = - 4
All you have to do is add like terms,
3.2x +(-5.6x)= -2.4x
-6+4= -2
Anyway, answer is
-2.4x-2
In most cases, you can do the inverse (opposite) operation on both sides of an equation to cancel out a certain value.
For example:
2x + 3y = 20
-2x + y = 4
This is a system of equations, just combine them to give you:
4y = 24
and divide both sides by 4:
y = 6
Sorry if this isn't what you were asking for, but the question was so vague, and this is what I assumed you were asking about, hopefully this helps regardless.