Question

what is the solution to the system of linear equations below?
{x + y = 5
{x - y = 3

Answer 1

One way to solve is to add the equations (straight down)


x + y = 5
x - y = 3
----------
2x+0y = 8


Notice how the two x's add to 2x, the y and -y add to 0y which goes away, and the 5 & 3 on the right side combine to 5+3 = 8


So we end up with 2x = 8 which means x = ???

Answer 2

?

Answer 3

where are you stuck?

Answer 4

these are the answer choices
a (8,-3)
b (6,-1)
c (5,2)
d (4,1)

Answer 5

if 2 times _____ = 8, then what goes in the blank?

Answer 6

d?

Answer 7

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