Such as 2x + 5y=1 -x+6y=8
2007-09-13 10:43:07 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
2x + 5y = 1
-2x + 12y = 16-----ADD
17y = 17
y = 1
2x + 5 = 1
2x = - 4
x = - 2
x = - 2 , y = 1
2007-09-13 10:56:19 · answer #1 · answered by Como 7 · 2⤊ 0⤋
2x + 5y=1
-x+6y=8 multiply this by 2 and add
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0 +17y=17
so y=1 put this solution into one of the lines
x=-2
systems problem?
these are 2 simultaneous equations with 2 unknowns
2007-09-13 11:18:37 · answer #2 · answered by Anonymous · 0⤊ 1⤋
2x + 5y = 1
-x + 6y = 8
Multiply the second guy by two and add it to the first guy to get rid of x.
17y = 17
y = 1
Now, plug this value in to either equation.
2x + 5(1) = 1
2x + 5 = 1
2x = -4
x = -2
You're done. It's as easy as that.
2007-09-13 10:57:02 · answer #3 · answered by PMP 5 · 0⤊ 2⤋