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Julianne Clarke
Mathematics
14 November, 04:57
3x-y=4
2x-3y=-9
Using substitution
+3
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1
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Cruz Gallegos
14 November, 05:06
0
3x-y=4
=> y=3x-4
2x-3y=-9
2x-3 (3x-4) = - 9
2x-9x+12=-9
-7x=-9-12
-7x=-21
=> x=21/7=3
3x-y=4
3*3-y=4
9-y=4
=> y=5
x=3, y=5
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