Question 1131613
A = S-10
A+10 = 3A
S-10+10 = 3(S-10)
S = 3S-30
-2S = -30
S = 15
and A = 15 - 10 = 5
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Check:
A+10 = 3A
5+10 = 3(5) 
15 = 15 Correct