If 2x+6y=2 and -7+5y=x, what is 2x?
3 Answers
2x=-4
Explanation:
You can solve this by using a system of equations and the substitution method.
Since the second equation has an
Solve for
Finally, plug your new
Multiply this
Hope this helps!
Explanation:
2x+6y=2to(1)
-7+5y=xto(2)
"substitute "x=-7+5y" into equation "(1)
2(-7+5y)+6y=2
rArr-14+10y+6y=2
rArr-14+16y=2
"add 14 to both sides"
cancel(-14)cancel(+14)+16y=2+14
rArr16y=16
"divide both sides by 16"
(cancel(16) y)/cancel(16)=16/16
rArry=1
"substitute "y=1" into equation "(2)
-7+5=xrArrx=-2
rArr2x=2xx-2=-4
Explanation:
Given:
We can write
Add
Add
Consider:
Multiply each term in
Add
Divide each term by
Hence,
Substitute
Add
Divide both sides by
So, we have
You want to find the value of
Hence
Hope this helps.