Question

3x+3y=21
-2x+2y=-10

Answer 1

can someone help mee

Answer 2

First find the value of x or y in terms of a single variable.
For example:
3x+3y=21
3(x+y)=21
x+y=21/3=7
x=7-y
Now substitute (7-y) in the place of x in second equation
-2x+2y=-10
-2(x+(-y)=-10
-2(7-y-y)=-10
-2(7-2y)=-10
-14+4y=-10
4y=-10+14
4y=4
y=1
x=7-y
x=7-1=6

Answer 3

so would that be inconsistene, consistent, or dependent?

Answer 4

What does those mean?
inconsistene, consistent, or dependent. I think consistent is those which solution is possible. So it is consistent.

Answer 5

yeah it means it can be solved
so what would the solution be?

Answer 6

6 and 1?

Answer 7

x=6 , y=1

Answer 8

Yes

Answer 9

thanks! what about this one
-2x+4y=-12
x-y=2

Answer 10

Substitute x=2+y in first equation.

Answer 11

thats the answer?