5x + 15y = 20
2x+ 6y = 12 I need to see all the work please and thank you!!! :)
I need to solve for x and y?
2010-05-07 4:14 pm
回答 (4)
2010-05-07 4:23 pm
✔ 最佳答案
5x + 15y = 20 ---------------------------(1)2x+ 6y = 12 ---------------------------(2)
divide (1) by 5 and (2) by 2
and subtract
x + 3y = 4
-
x + 3y = 6
----------------------
ohhhhhhhhh there is NO answer........
just look at new equations RHS are different and LHS are same it is impossible....... :)
2010-05-11 3:12 pm
2(5x+15y=20)
5(2x+6y=12)
10x+30y=40
10x+30y=60
undefined because you cant divide by 0
5(2x+6y=12)
10x+30y=40
10x+30y=60
undefined because you cant divide by 0
2010-05-07 4:26 pm
5x+15y=20 /5
=x+3y=4---------1
2x+6y=12 /2
=x+3y=6----------------2
subtacting 1 from 2
we get
hey!!!!!!!!!
it will have no solutions
=x+3y=4---------1
2x+6y=12 /2
=x+3y=6----------------2
subtacting 1 from 2
we get
hey!!!!!!!!!
it will have no solutions
2010-05-07 4:17 pm
Double the first equation:
10x + 30y = 40
Multiply the second equation by 5:
10x + 30y = 60
The two equations above contradict each other, so there is no solution.
10x + 30y = 40
Multiply the second equation by 5:
10x + 30y = 60
The two equations above contradict each other, so there is no solution.
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