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Kiana Sawyer
Mathematics
14 April, 21:31
If 4u-5v=23 and 2u+4v=-8, find the value of u+v
+3
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1
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Volvo
14 April, 21:53
0
-1
Step-by-step explanation:
4u-5v=23
-2 (2u+4v=16) We multiply by - 2 here to destroy u's.
4u-5v=23
-4u-8v=16 we addition both processes
-13v=39 so, v=-3
4u-5 (-3) = 23, 4u=8 so, u=2
u+v = - 3+2 = - 1
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