SOLUTION: 1.SOLVE THE SYSTEM BY SUBSTITUTION A)3x+4y=11 B)3x+2y=6 -8-y=19 2x+5y=-7

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Question 1156928: 1.SOLVE THE SYSTEM BY SUBSTITUTION
A)3x+4y=11 B)3x+2y=6
-8-y=19 2x+5y=-7
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
SOLVE THE SYSTEM BY SUBSTITUTION

   A)3x+4y=11           B)3x+2y=6                                              
     -8-y=19              2x+5y=-7


A:
Did you omit something? As shown, you have y=-8-19=-27; substituting you make 3x%2B4%2A%28-27%29=11
3x=11%2B4%2A27
3x=119
x=39%262%2F3
-
x=39%262%2F3andy=-27

B:
Why substitution?
system%282%283x%2B2y%29=2%2A6%2C3%282x%2B5y%29=3%28-7%29%29
system%286x%2B4y=12%2C6x%2B15y=-21%29
and from this you could solve either for 6x and substitute into the other...