Elimination using multiplication What is the best answer? 2x+y=0
2 answers:
Answer:
x = -2, y = 4
Step-by-step explanation:
2x + y = 0
5x + 3y = 2
Multiply the top equation by -3 so that one variable can be eliminated:
-3(2x + y = 0)
5x + 3y = 2
Simplify the top equation:
-6x - 3y = 0
5x + 3y = 2
Add the equations:
-x = 2
Solve for x:
x = -2
Substitute x back into one of the equations:
5(-2) + 3y = 2
Solve for y:
-10 + 3y = 2
3y = 12
y = 4
Answer:
x=-2, y=4. (-2, 4).
Step-by-step explanation:
2x+y=0
5x+3y=2
----------------
-3(2x+y)=-3(0)
5x+3y=2
-------------------
-6x-3y=0
5x+3y=2
---------------
-x=2
x=-2
2(-2)+y=0
-4+y=0
y=0-(-4)
y=0+4
y=4
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Answer:
y=4, x=8
Step-by-step explanation:
system:
x+y = 12, x=2y
convert to 1 variable, simplify:
2y+y=12
3y=12
y=4
x=2y=4*2=8
You have to explain how you knew to use 55 and 120, not another option.
Hope it helped! :)
