SOLUTION: 7n+21-2n+21=-4

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Question 19057: 7n+21-2n+21=-4
Answer by Alwayscheerful(414) About Me  (Show Source):
You can put this solution on YOUR website!
Solved by pluggable solver: EXPLAIN simplification of an expression
Your Result:


YOUR ANSWER


  • Here's what you tried:
  • This is an equation! Solutions: n=-9.2.
  • Graphical form: Equation 7n%2B21-2n%2B21=-4 was fully solved.
  • Text form: 7n+21-2n+21=-4 simplifies to 0=0
  • Cartoon (animation) form: simplify_cartoon%28+7n%2B21-2n%2B21=-4+%29
    For tutors: simplify_cartoon( 7n+21-2n+21=-4 )
  • If you have a website, here's a link to this solution.

DETAILED EXPLANATION

Look at 7%2An%2Bhighlight_red%28+21+%29-2%2An%2Bhighlight_red%28+21+%29=-4.
Added fractions or integers together
It becomes 7%2An%2Bhighlight_green%28+42+%29-2%2An=-4.
Look at 7%2An%2Bhighlight_red%28+42+%29-2%2An=-4.
Moved 42 to the right of expression
It becomes 7%2An-2%2An%2Bhighlight_green%28+42+%29=-4.
Look at highlight_red%28+7%2An+%29-highlight_red%28+2%2An+%29%2B42=-4.
Eliminated similar terms highlight_red%28+7%2An+%29,highlight_red%28+-2%2An+%29 replacing them with highlight_green%28+%287-2%29%2An+%29
It becomes highlight_green%28+%287-2%29%2An+%29%2B42=-4.
Look at %28highlight_red%28+7+%29-highlight_red%28+2+%29%29%2An%2B42=-4.
Added fractions or integers together
It becomes %28highlight_green%28+5+%29%29%2An%2B42=-4.
Look at highlight_red%28+%28highlight_red%28+5+%29%29%2An+%29%2B42=-4.
Remove unneeded parentheses around factor highlight_red%28+5+%29
It becomes highlight_green%28+5+%29%2An%2B42=-4.
Look at 5%2An%2B42=highlight_red%28+-4+%29.
Moved these terms to the left highlight_green%28+4+%29
It becomes 5%2An%2B42%2Bhighlight_green%28+4+%29=0.
Look at 5%2An%2Bhighlight_red%28+42+%29%2Bhighlight_red%28+4+%29=0.
Added fractions or integers together
It becomes 5%2An%2Bhighlight_green%28+46+%29=0.
Look at highlight_red%28+5%2An%2B46+%29=0.
Solved linear equation highlight_red%28+5%2An%2B46=0+%29 equivalent to 5*n+46 =0
It becomes highlight_green%28+0+%29=0.
Result: 0=0
This is an equation! Solutions: n=-9.2.

Universal Simplifier and Solver


Done!

Hope this helps!