Question 28861: I'm having trouble solving the following:
7x+3(5-2x)=21
I know x=6 but I'm having difficulty figuring out the steps.
Can you start me out in the right direction?
I don't know how to get rid of the x in the parenthesis.
Any help you could give me would be appreciated.
Answer by Lal(16)   (Show Source):
You can put this solution on YOUR website! 7x + 3(5 - 2x) = 21
For the parentheses, you have to distribute the 3 to the numbers inside of them. So, it would look like this, after distribution:
7x + 15 - 6x = 21
And then, to solve:
7x - 6x = 6
1x = 6
x = 6
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