Question

Solve the system of equations
10x-7y=-6
5x+7y=81

Answer 1

What do you get when you add the equations?

Answer 2

idk

Answer 3

we get

10x-7y=-6
5x+7y=81
----------
15x+0y = 75

which becomes

15x = 75

Answer 4

Do you see where to go from here?

Answer 5

yes

Answer 6

alright great

Answer 7

dont u have 2 find y first though

Answer 8

No, when you add the equations, the y terms will cancel out and go away.

Answer 9

So following the method above, you solve for x first, then you use it to find y.

Answer 10

okaii shanxs

Answer 11

yw

Answer 12

does it end up being (5,6.28) when you put it as an ordered pair

Answer 13

It should be (5,8)

Answer 14

5x+7y=81

5*5+7y=81

25+7y = 81

7y = 81 - 25

7y = 56

y = 56/7

y = 8

So this shows us that the solution is (5,8)

Answer 15

k shanxs again

Answer 16

sure thing