Question

What is the answer i really need help
2x-7+-9x+81

Answer 1

Your expression seems a little incomplete. It seems you mean to ask

`2x-7+\left(-9x\right)+81=0`

So, I am solving the question based on this, which anyways will solve your query.

Answer:

Please check the explanation.

Explanation:

Given the expression

`2x-7+\left(-9x\right)+81=0`

`\mathrm{Remove\:parentheses}:\quad \left(-a\right)=-a`

`2x-7-9x+81=0`

`\mathrm{Group\:like\:terms}`

`2x-9x-7+81=0`

`\mathrm{Add\:similar\:elements:}\:2x-9x=-7x`

`-7x-7+81=0`

`\mathrm{Add/Subtract\:the\:numbers:}\:-7+81=74`

`-7x+74=0`

`\mathrm{Subtract\:}74\mathrm{\:from\:both\:sides}`

`-7x+74-74=0-74`

`-7x=-74`

`\mathrm{Divide\:both\:sides\:by\:}-7`

`(-7x)/(-7)=(-74)/(-7)`

`x=(74)/(7)`

Therefore, the answer is:

• 
  `x=(74)/(7)`