Wednesday
October 22, 2014

Homework Help: math, beginning algebra

Posted by jasmine20 on Wednesday, December 20, 2006 at 2:35am.

how do you solve this i've tried many ways and i always get stuck.

-4(2x - 3 ) = -8x + 5

you use -4x times 2x first, then you times -3. so you have (-8+12)=8x+5. you know -8+12 is 4, so the equation becomes 4=8x+5. so x is probably a negative number. so 4=5+8x and then you know 4-5=8x. -1=8x, so x is -1/8. i think that's the answer.

opps. i think i missed the x. is there even an answer?


-4*2x=-8x
-4*-3=-12 so
-8x-12=-8x+5
Adding 8x to each side gives
-8x+8x-12=-8x+8x+5
0x-12=0x+5
So the x term cancels and this equation has no solution.Obviously -12 does not equal +5.

I hope this helps.

Oy! 2 mistakes in the responses(It's ok...we all make mistakes) Ultimately, there is no answer. BUT...

-4 (2x-3) = -8x +5

-8x + 12 = -8x +5

The 8x's cancel each other out. So Dr. Bob's response should say

"Obviously +12 does not equal +5"

Bob's right: There's no solution.

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

Math - Use your knowledge of exponents to solve. a) 1/2^x=1/(x+2) b) 1/2^x>1/...
Math - How would you solve a problem like this with logarithims? I tried to ...
Math - I am stuck on a problem that has to do with the double angle formulas. I ...
calculus - I am studying for a final exam and in our review packet we have this ...
ALGEBRA 1!PLZ HELP! - Use the Substitution method to solve the system of ...
Algebra - -55=6x-x-5? I have tried this equation so many times and I cant solve ...
Math - I'm stuck on this 1 math problem. I've tried many ways to figure it out, ...
Algebra - Hello, I have been trying a few ways to do this problem and am not ...
Algebra 2 - I need help with this problem, (3-x)/-4 = (x+6)/3 Thanks! I've tried...
algebra - I'm a little confused on how to solve this: The number of cricket ...

Search
Members