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2007-07-13 08:03:26 · 7 answers · asked by JeususismyRock! 1 in Science & Mathematics ➔ Mathematics
x+y=6
x-y=4
---------------
x+x+y-y=6+4
2x=10
x=10/2
x=5
x+y=6
(5)+y=6
y=6-5
y=1
ergo:
x=5, y=1
2007-07-13 08:06:11 · answer #1 · answered by ΛLΞX Q 5 · 0⤊ 0⤋
1) x + y = 6
2) x - y = 4
Add the left sides and the right sides
x + y + x - y = 6 + 4
2x = 10
x = 5
Substitute into either equation 1 or 2
x + y = 6
5 + y = 6
y = 1
Check
x - y = 4
5 - 1 = 4
4 = 4
2007-07-13 15:11:10 · answer #2 · answered by kindricko 7 · 0⤊ 0⤋
X+Y=6
X-Y=4
-----------------
2x=10
x=5
5+Y=6
y=6-5
y=1
(5,1)
2007-07-13 15:07:51 · answer #3 · answered by fofo m 3 · 0⤊ 0⤋
X+Y=6
X-Y=4
X+X+Y+(-Y)=6+4
X-Y=4
2X=10
X-Y=4
X=5
5-Y=4
X=5
Y=1
2007-07-13 15:46:19 · answer #4 · answered by God_Of_War 2 · 0⤊ 0⤋
(eq1) x+y=6
(eq2) x-y=4
rearrange (eq1) by subtracting x on both sides
y=6-x
subsitute this in for y in (eq2)
x-y=4
x-(6-x)=4
x-6+x=4
2x-6=4
add 6 to both sides
2x=10
divide by 2 on both sides
x=5
Sub this back into (eq1)
x+y=6
5+y=6
y=1
final answer x=5, y =1 (you can check this by subbing these back in the orgional equations).
2007-07-13 15:10:45 · answer #5 · answered by charve2000 4 · 0⤊ 0⤋
2X = 10
X = 5
Y = 1
2007-07-16 13:33:28 · answer #6 · answered by Como 7 · 0⤊ 0⤋
first find a way to eliminate one of the variables. that's all im going to say.
2007-07-13 15:08:00 · answer #7 · answered by How To Save A Life 2 · 0⤊ 0⤋