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Mathematics
Paula Holden
29 October, 10:33
Solve for x?
2x + y = 7
x - y = 5
+4
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2
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Dana Benton
29 October, 12:37
0
X=4 because the y cancel out and all your left with is 3x=12 the you divide by 3 and get 4
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Mateo Jenkins
29 October, 12:38
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Given 2x+y=7 ... 1
x-y=5 ... 2
put x=5+y in 1
2 (5+y) + y=7
10+2y+y=7
3y=-3
y=-1
x=5+y
=5-1
=4
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