3y+mn=6
8y-6x=7
i need to find m
pls help me solve thanks
2007-06-21 01:06:17 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
(10,2) 3y+mn=6
8y-6x=7
i need find m
how to solve it?
2007-06-21 01:24:03 · update #1
Like the poster above said there are 2 equations and 4 unknowns. But you can simplify the expression to solve for m.
You have m = (6-3y)/n and y = (6x+7)/8
So combining them you get
m = [6 - 3(6x+7)/8]/n
m = [48 - 3(6x+7)]/(8n)
m = (27 - 18x)/(8n)
m = 9(3 - 2x)/(8n)
2007-06-21 01:30:52 · answer #1 · answered by Astral Walker 7 · 0⤊ 1⤋
Where is the x in the first eq.?
I assume you meant:
3y + mx = 6 ..... (1)
8y - 6x = 7 ..... (2)
And what I think you mean is that (10, 2) is a solution of (1), since it is not a solution of (2)
Put y = 10, x = 2 in (1)
3(10) + 2m = 6
20 + 2m = 6
2m = 6 - 20
2m = -14
m = -7
2007-06-21 08:56:42 · answer #2 · answered by Akilesh - Internet Undertaker 7 · 0⤊ 0⤋
you can not find the answer. because there are 2 equations 4 unknowns.
you can't find any unknown from those 2 equations.
there is no formula, if you have two unknowns & two equations just solve for one unknown in terms of other(unknown) and put it in the other then you get the answer.
2007-06-21 08:20:52 · answer #3 · answered by Anonymous · 1⤊ 0⤋