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arlik [135]
2 years ago
9

The system on the left can be reduced to: t + u = 9 9t – 9u = –9 Solving the system t= , u=

Mathematics
2 answers:
LenaWriter [7]2 years ago
5 0
We have that
<span>t + u = 9 --------> t=9-u-----------> equation 1
9t – 9u = –9----------> equation 2
</span>
I substitute 1 in 2
9*[9-u]-9u=-9
81-9u-9u=-9
18u=81+9
18u=90
u=90/18---------> u=5
t=9-u------> t=9-5----> t=4

the answer is
u=5
t=4




Darya [45]2 years ago
5 0

Answer:

the answer is

u=5

t=4

Step-by-step explanation:

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