Question

Select all equations that can result from adding these two equations or subtracting one from the other. x+y= 12 3x- 5y = 4 4x4y=16 2-6y=-8 -2-4y=8 5x4y=28 -2x+6y=8 2x+y=16

Answer 1

Answers:

4x - 4y = 16

-2x + 6y = 8

Step-by-step explanation:

When we add both equation, we get:

x + y = 12

3x - 5y = 4

4x - 4y = 16

Then, if we subtract the second equation from the first one, we get:

x + y = 12 x + y = 12

- ( 3x - 5y = 4) -------> -3x + 5y = -4

-2x + 6y = 8

So, the equations that result from adding or subtracting one from other are:

4x - 4y = 16

-2x + 6y = 8