138k views
1 vote
Solve for x.

3(3x - 1) + 2(3 - x) = 0

x = 3/7
x = -3/7
x = 1/3
x = -1/3

User Simon Ordo
by
8.4k points

1 Answer

4 votes
First of all you always solve the brackets first, to do this you need to multiply each item in the bracket by what is beside it:
3(3x - 1) = 9x - 3
2(3 - x) = 6 - 2x
And place it back in to the equation:
9x - 3 + 6 - 2x = 0

You can then solve the non x numbers:
-3 + 6 = 6 - 3 = 3
And place it back in to the equation...
9x + 3 - 2x = 0

Like we did for the -3 and 6, you need to solve the X's:
9x - 2x = 7x
And place it back in to the equation...
7x + 3 = 0

Then you minus 3 from both sides so you move it over to the right hand side:
7x + 3 - 3 = 0 - 3
Then solve it...
7x = -3

Then you divide both sides by 7 to get 1 X:
7x / 7 = -3/7
x = -3/7 (you can keep it as a fraction)

The answer is X = -3/7,
Hope this helps! :)
User Arjunsingh
by
8.3k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories