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kobusy [5.1K]
4 years ago
8

If 4u-5v=23 and 2u+4v=-8, find the value of u+v

Mathematics
1 answer:
DIA [1.3K]4 years ago
6 0

Answer:

-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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