SOLUTION: hello, with the substitution method, how to solve: y = 3x + 11 3x + 3y =0 thank you!

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Question 62222This question is from textbook Algebra for college students
: hello,
with the substitution method, how to solve:
y = 3x + 11
3x + 3y =0
thank you! This question is from textbook Algebra for college students

Answer by Cintchr(481) About Me  (Show Source):
You can put this solution on YOUR website!
1. +y+=+3x+%2B+11+
2. +3x+%2B+3y+=0+
Substitute 1 into 2
+3x+%2B+3%283x+%2B+11%29+=0+
distribute
+3x+%2B+9x+%2B+33+=0+
combine like terms
+12x+%2B+33+=+0+
subtract 33 from both sides
+12x+=+-33+
divide by 12
+x+=+-33%2F12+

Substitute this back into equation 1
+y+=+3x+%2B+11+
+y+=+3%28-33%2F12%29+%2B+11+
+y+=+-33%2F4+%2B+11+
Find like terms
+y+=+-33%2F4+%2B+44%2F4+
+y+=+11%2F4+

Solution : ( -33/12 , 11/4 )