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OpenStudy (anonymous):
substitutions help again! Did this 4 times different answer every time 3x+2y=23 1/2x-4=y
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OpenStudy (amistre64):
what does "y" equal in relation to "x" ?
OpenStudy (amistre64):
"(1/2)x -4" = "y" right?
OpenStudy (anonymous):
I can see that, I used this as a substitute for y and keep getting different answers.
OpenStudy (anonymous):
\[3x+2y=23\] put in Y \[3x+2(1/2x-4)\] distribute the 2*1/2x and 2*-4 \[3x+x-8=23\] solve
OpenStudy (amistre64):
yep, then its the adding thats giving you troubles :) happens to me alot still on my calculus tests
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