SOLUTION: the sum of three numbers is 90 the first number is 10 more than the second. The third number is three times the second

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Question 1024873: the sum of three numbers is 90 the first number is 10 more than the second. The third number is three times the second
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
A%2BB%2BC=90
A=10%2BB
C=3B
Substituting,
%2810%2BB%29%2BB%2B%283B%29=90
5B%2B10=90
Solve for B, then go back and solve for A and C.