SOLUTION: Okay - today I am stuck with linear equations.... I have solved the equation, but something is not right becasue when I go to substitute into the equation, it does not equal.... Pl

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Question 5795: Okay - today I am stuck with linear equations.... I have solved the equation, but something is not right becasue when I go to substitute into the equation, it does not equal.... Please help!! Thanks!
Here's the first:
-5z-3-4(z+1)=2z+6
I solved it and came up with -13/11. This however does not check.
and number two:
-3[-6p+4-5(p-1)=-2p-5
I solved this and came up with -8/35. Again, this will not check.
Finally number three:
2p=5(2p+5)
I solved this and came up with -8/25. And you guessed it, this did not check.
HELP!!! I believe I solved them correctly, but why are they not checking???

Answer by ichudov(507)   (Show Source): You can put this solution on YOUR website!
Solved by pluggable solver: EXPLAIN simplification of an expression
Your Result:


YOUR ANSWER


  • This is an equation! Solutions: z=-1.18181818181818.
  • Graphical form: Equation was fully solved.
  • Text form: -5z-3-4*(z+1)=2z+6 simplifies to 0=0
  • Cartoon (animation) form:
    For tutors: simplify_cartoon( -5z-3-4*(z+1)=2z+6 )
  • If you have a website, here's a link to this solution.

DETAILED EXPLANATION

Look at .
Moved -3 to the right of expression
It becomes .
Look at .
Moved these terms to the left highlight_green%28+-2%2Az+%29,highlight_green%28+-6+%29
It becomes .
Look at .
Added fractions or integers together
It becomes .
Look at .
Moved -9 to the right of expression
It becomes .
Look at .
Removed extra sign in front of -9
It becomes .
Look at .
Eliminated similar terms highlight_red%28+-5%2Az+%29,highlight_red%28+-2%2Az+%29 replacing them with highlight_green%28+%28-5-2%29%2Az+%29
It becomes .
Look at .
Added fractions or integers together
It becomes .
Look at .
Removed extra sign in front of -7
It becomes .
Look at .
Remove unneeded parentheses around factor highlight_red%28+7+%29
It becomes .
Look at .
Expanded term -4 by using associative property on %28z%2B1%29
It becomes .
Look at .
Multiplied numerator integers
It becomes .
Look at .
Added fractions or integers together
It becomes .
Look at .
Removed extra sign in front of -13
It becomes .
Look at .
Eliminated similar terms highlight_red%28+-7%2Az+%29,highlight_red%28+-4%2Az+%29 replacing them with highlight_green%28+%28-7-4%29%2Az+%29
It becomes .
Look at .
Added fractions or integers together
It becomes .
Look at .
Removed extra sign in front of -11
It becomes .
Look at .
Remove unneeded parentheses around factor highlight_red%28+11+%29
It becomes .
Look at .
Solved linear equation highlight_red%28+-11%2Az-13=0+%29 equivalent to -11*z-13 =0
It becomes .
Result:
This is an equation! Solutions: z=-1.18181818181818.

Universal Simplifier and Solver


Done!


as you can see, the solution is +13/11.
Your second equation has a '[' in it that does not close, so I cannot guess what you meant.
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