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allochka39001 [22]
3 years ago
12

1) 7+a=15 2) 23=d+44 3) 28=n-14 4) T-22=-31

Mathematics
2 answers:
Romashka [77]3 years ago
6 0
Hi, I'd be glad to help. 

1) a = 8

2) d = (-21) 

3) n = 42

4) t = (-9)
Rom4ik [11]3 years ago
3 0
1.7+a=15
subtract 7
a=8
2. 23=d+44
subtract 44
-21=d
3. 28=n-14
add 14 
n=42
4.T-22=-31
add 22
t= -9

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