Question

solve the system of equations and give the value of x... 7x+4y=-13.... -7x-11y=48.... ANSWER: x=-1?x=7?....x=-7?....x=1?

Answer 1

7x+4y=-13
CAN u express y in terms of x from here?

Answer 2

NO

Answer 3

7x+4y=-13
4y=-13-7x
y=(-13-7x)/4

Answer 4

got it?

Answer 5

If you don't know how to isolate a variable, then you need to learn how to do it.

Answer 6

Regardless, this system can be solved easily with elimination. Add the equations to eachother.

Answer 7

But we do not need y

Answer 8

The 7x and -7x should cancel out nicely, and you can solve for y then.

Answer 9

ALTHOUGH WE ARE TRYING TO SOLVE FOR X.. CAN WE CANCEL X? SINCE THEY ARE OPPOSITES?

Answer 10

yes

Answer 11

Then solve for y and substitute it any o equation and solve for x to find x

Answer 12

one*

Answer 13

Y=5?

Answer 14

-5

Answer 15

got it?

Answer 16

SO X=1?

Answer 17

y=-5

Answer 18

YES.... I THINK I COULDNT FIGURE IT OUT BECAUSE I LEFT OUT THE (-)...

Answer 19

Now, find x

Answer 20

RIGHT.. BUT AFTER ITS ALL FACTORED IN.. THE ANSWER FOR X IS 1?