SOLUTION: is this correct or incorrect -2(a-3)=6 -2a-6=6 please solve and show work. 5-3(2b-3)=-4 please write a formula. find three consecutive numbers whose sum is 72. thank

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: is this correct or incorrect -2(a-3)=6 -2a-6=6 please solve and show work. 5-3(2b-3)=-4 please write a formula. find three consecutive numbers whose sum is 72. thank      Log On


   

Question 390162: is this correct or incorrect
-2(a-3)=6
-2a-6=6
please solve and show work.
5-3(2b-3)=-4
please write a formula.
find three consecutive numbers whose sum is 72.
thanks for your help.
Found 2 solutions by jim_thompson5910, mananth:
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
I'll do the first one to get you started.


-2%28a-3%29=6 Start with the given equation.


-2a%2B6=6 Distribute. (note: this is where you made a mistake)


-2a=6-6 Subtract 6 from both sides.


-2a=0 Combine like terms on the right side.


a=%280%29%2F%28-2%29 Divide both sides by -2 to isolate a.


a=0 Reduce.


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Answer:

So the solution is a=0


If you need more help, email me at jim_thompson5910@hotmail.com

Also, feel free to check out my tutoring website

Jim

Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!
-2(a-3)=6
-2a+6=6
add -6 to both sides
-2a+6-6=6-6
-2a=0
a=0

please solve and show work.
5-3(2b-3)=-4
5-6b+9=-4
-6b+14=-4
add -14 to both side
-6b+14-14=-4-14
-6b=-18
/-6
-6b/-6=-18/-6
b=3
please write a formula.
find three consecutive numbers whose sum is 72.
let the numbers be x, x+1,x+2
...
x+x+1+x+2=72
3x+3=72
add -3 to both sides
3x=72-3
3x=69
/3
x=69/3
x=23
23,24,25
...
m.ananth@hotmail.ca
thanks for your help.