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Mathematics
Carlee Cohen
25 June, 09:44
3x + 7y = 47
-4x + 7y = 19
+3
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1
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Sidney Thomas
25 June, 10:28
0
3x+7y=47
-1 (-4x+7y=19)
Distribute the - 1 and add the equations together ... you'll get:
7x=28
x=4
Plug X=4 back in ...
12+7y=47
7y=35
y=5
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