Question

what is the solution of this linear system 3x+y=-2 y=-x+4

Answer 1

what does y equal?

Answer 2

they tell you up front that: y=-x+4

use that to solve for x. All the y parts in the system have to be the same ....

Answer 3

the first equation is setup as:


3x + y = -2
^^
we know this is equal to -x+4

3x + (-x+4) = -2

now it is relatively simple to find a solid value for x

Answer 4

when we have a known value for x, we can then use it to define y=-x+4

Answer 5

3x - 1x + 4 = -2
2x +4= -2
2x = -6
x= -3

Answer 6

good job :)

since x = -3

y = -(-3) + 4

Answer 7

y = 5

Answer 8

not quite

Answer 9

y = -(-3) + 4

y = 3 + 4

Answer 10

i know i messed up on it lol y= 7

Answer 11

then lets go with the (-3,7) ;) good job