SOLUTION: It has been a while. How do I solve -7x + 4x = 9 ? Thank you

Algebra ->  Complex Numbers Imaginary Numbers Solvers and Lesson -> SOLUTION: It has been a while. How do I solve -7x + 4x = 9 ? Thank you       Log On


   

Question 11246: It has been a while.
How do I solve -7x + 4x = 9 ?
Thank you
Answer by roxy9229(32) About Me  (Show Source):
You can put this solution on YOUR website!
-7x + 4x = 9
add like terms

rules of addition
opposite sign: subtract
same sign: add
take sign of larger #

7x-4x=3x and since the -7 is bigger, it is -3x

-3x=9
divide both sides by -3
x=-3