math, beginning algebra
posted by jasmine20 on .
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 45=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
8x12=8x+5
Adding 8x to each side gives
8x+8x12=8x+8x+5
0x12=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 (2x3) = 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.

durrrr