Expert: Richard J. Raridon - 6/5/2006

Question
     



1.solve for x.
a.0=x+(-12)
b.1/4x=12
c.2x-5+5=2x
d.2/3x=-4/3

2.simplify
a.3(x+1)+4
b.(x+2)(x-4)+ 5
c.-2x(-3x)

3.solve for x.
a.0.5x=3.5
b.x/2=-5/4
c.2/3x+203=709  

Answer
You can add or subtract the same thing from both sides of an equals sign without changing the answer.  You can also multiply or divide both sides by the same thing without changing the answer.  
1a. add 12 to each side so 12 = x
b. multiply each side by 4 so x = 48
c. no solution since you have 2x = 2x
d. multiply each side by (3/2) to get x = -2
2a. 3x+7
b. x^2 -2x -3
c. 6x^2
3a. multiply each side by 2 to get x = 7
b. multiply each side by 2 to get x = -5/2
c. subtract 203 from each side to get (2/3)x= 506
and then multiply each side by 3/2 to get x = 759