Answer to this equation?

hi Saseflower,

You can check your answer but substituting 13.3 in for x on the right hand side of the question and seeig if it equals 172.

like this

-6*13.3-4(4*13.3-10)

$${\mathtt{\,-\,}}{\mathtt{6}}{\mathtt{\,\times\,}}{\mathtt{13.3}}{\mathtt{\,-\,}}{\mathtt{4}}{\mathtt{\,\times\,}}\left({\mathtt{4}}{\mathtt{\,\times\,}}{\mathtt{13.3}}{\mathtt{\,-\,}}{\mathtt{10}}\right) = {\mathtt{\,-\,}}{\frac{{\mathtt{1\,263}}}{{\mathtt{5}}}} = -{\mathtt{252.6}}$$

It doesn't equal the left hand side which was 172 so  x cannot be equal to 13.3.  

Understand?  

172 = -6x - 4(4x - 10)

First use distributive property

173 = -6x - 16x + 40

Combine like terms

173 = 10x + 40

Now subtract 40 to both sides

133 = 10x

Divide both sides by 10

13.3 = x

P.S I might have did something wrong, I'm not sure but I just wanted to warn you :)

172 = -6x - 4(4x - 10)   distribute the "-4 " over the terms in the parentheses

172 =-6x - 16x + 40     combine like terms on the right

172 = -22x + 40           subtract 40 from both sides

132  = -22x                  divide by -22 on each side

-6 = x

Don't worry about it, saseflower.....you just made a slight error when you combined -6x and -16x .....I gave you points for a good effort...

[Also, where did the "173" come from ??? ]

Melody is correct, saseflower......we should check our answers....I forgot to do this today, and I gave a wrong answer....shame on me...!!!