Question

x + 2y = -9
4x - 2y = 14

A. (-5,1)
B. (-4,1)
C. (1,-5)
D. (1,-4)

Answer 1

@Brill
@Decarr432
@foolofatook
@mthompson440

Answer 2

this seems like a system of equations problem...

is there a certain way (substitution or elimination) that you are asked to solve this problem?

Answer 3

idk @calculusxy

Answer 4

okay. so i think that using elimination will be much better. do you know how to solve systems using the elimination method?

Answer 5

not realy

Answer 6

the elimination method means that we get rid of one variable (x or y) and then solve for the other variable that is present through zero pairs.

for instance, if we have the equations \(x+3y=-14\) and \(-4x-3y=2\), we can get rid of the y variable because \(3y - 3y = 0y \text{ } \text{or simply 0}\).

Answer 7

o got -4,1

Answer 8

then we would have the x variable to solve for
\(x + (-4x) = -4x\) and \(-14 + 2 = -12\)
\(-3x=-12\)
\(x=4\)

Answer 9

sorry
\(x + (-4x) = -3x\)

Answer 10

ohh

Answer 11

similarly, in this situation
\(x + 2y = -9\)
\(4x - 2y = 14\)
we can easily get rid of y because \(2y + (-2y) = 0y \text{ } \text{or 0}\)

to solve for x we can have \(x + 4x = 5x\) and \(-9+14=5\)
\(5x=5\)
\(x=\text{?}\)

Answer 12

do you understand ?

Answer 13

wount x be be 0

Answer 14

can you show me your work?

Answer 15

well i dont really know how that stuffs works u know so used to saying it out load

Answer 16

do you understand the work that i showed?

Answer 17

yeah man thank u

Answer 18

okay and remember to plug back in that x = 1 to x + 2y = -9 or the other equation and solve for y!