Question

5x+y=0
5x+2y=30 Solve by elimination need help to make sure im right :D

Answer 1

5x+y=0
5x=-y
x=-y/5

plug this into the other equation...
5x+2y=30
5(-y/5)+2y=30
-y+2y=30
y=30

x=-30/5=-6

Answer 2

but i need a little more explanation...like a walk through of all the steps

Answer 3

Start with one equation: 5x+y=0
Subtract y from both sides: 5x=-y
Divide both sides by 5: x=-y/5
Plug this value of x into the x in the other equation (5x+2y=30):
5(-y/5)+2y=30
Simplify:-y+2y=30
-y+2y=y, so: y=30
Then plug this back into x=-y/5 (from the other equation):
x=-30/5
Simplify:
x=-6
And that is the answer as well as I can explain it! :)

Answer 4

thank you