SOLUTION: 3[7 - (7x - 4)] + 6x = 0 I completely forgot how to do problems like this. I know you start with the innermost (), but i don't know how to combine 7-(7x-4)

Algebra ->  Linear-equations -> SOLUTION: 3[7 - (7x - 4)] + 6x = 0 I completely forgot how to do problems like this. I know you start with the innermost (), but i don't know how to combine 7-(7x-4)      Log On


   

Question 150801: 3[7 - (7x - 4)] + 6x = 0
I completely forgot how to do problems like this. I know you start with the innermost (), but i don't know how to combine 7-(7x-4)
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
Start with the given equation.


Distribute



Multiply 3 and 7 to get 21


21-21x%2B12%2B6x=0 Distribute.


-15x%2B33=0 Combine like terms on the left side.


-15x=0-33 Subtract 33 from both sides.


-15x=-33 Combine like terms on the right side.


x=%28-33%29%2F%28-15%29 Divide both sides by -15 to isolate x.


x=11%2F5 Reduce.


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Answer:

So the answer is x=11%2F5


Which approximates to x=2.2