SOLUTION: If {{{ (-3z+6)/3 + z/5 = 12 }}} then {{{ 4z^2+2z+50 }}} is what?

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Question 590931: If +%28-3z%2B6%29%2F3+%2B+z%2F5+=+12+ then +4z%5E2%2B2z%2B50+ is what?
Answer by lwsshak3(11628) About Me  (Show Source):
You can put this solution on YOUR website!
If (-3z+6)/3 + z/5 = 12 then 4z^2+2z+50 is what?
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(-3z+6)/3 + z/5 = 12
-z+2 + z/5 = 12
-5z+10 + z = 60
-4z = 50
z=-50/4=-25/2
..
4z^2+2z+50
=4(-25/2)^2+2(-25/2)+50
=4(625/4)-25+50
=625-25+50=650