The problem is:
8x-5=4x+4-2x
my brother came up with -1/6 (-1 over 6) Is that right??? If not can you explain???
2006-09-27 17:29:06 · 13 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
8x-5=4x+4-2x
-4 -4
8x-9=4x-2x
8x-9=2x
+9 +9 (so there will be positives on both sides_
8x=2x+9
-2x -2x
6x=9
/6 /6
x=3/2 or 1.5
Brother isn't right
Check the results if you aren't sure
put in 3/2 for x
8(3/2)-5=4(3/2)+4-2(3/2)
12-5=6+4-3
7=7
2006-09-27 17:33:45 · answer #1 · answered by Jessica 6 · 0⤊ 0⤋
8x-5=4x+4-2x
8x-4x+2x=4+5(collecting all the like terms)
4x+2x=9
6x=9
x=9/6
x=3/2
answer is x=3/2 and not -1/6
2006-09-28 05:51:26 · answer #2 · answered by srirad 2 · 0⤊ 0⤋
YOUR BRO WAS WRONG
CORRECT HIM AS WELL
8x-5=4x+4-2x
bring the like terms together
8x-4x+2x=4+5
6x=9
x=9/6=3/2=1.5=answer
2006-09-28 01:24:13 · answer #3 · answered by KSA 3 · 0⤊ 0⤋
8x - 5 = 4x +4 - 2x
8x - 5 = 2x +4
6x = 9
x = 9/6 = 3/2
2006-09-28 00:31:42 · answer #4 · answered by captn_carrot 5 · 0⤊ 0⤋
i got 3/2 but you can wait until someone else verifies it as correct. but basically you have to get all the x's on one side so first subract 2x from 4x which leaves you with a 2x+4. then you subract that 2x from 8x on the left side and then add 5 to the right side now you have 6x=9 and then you simplify and end up with 3/2.
2006-09-28 00:38:24 · answer #5 · answered by B 2 · 0⤊ 0⤋
8x - 5 = 4x + 4 -2x (collect terms):
6x = 9 (solve for x)
x = 9 / 6
x = 3 / 2
Plug in 3 / 2 for x to check...
2006-09-28 00:31:48 · answer #6 · answered by Professor 3 · 0⤊ 0⤋
its 3/2
8x-5=4x+4-2x
8x-5=2x+4 (added the 4x and -2x)
6x-5=4 (subtracted the 2x)
6x=9 (added 5 to the other side)
x=3/2 (divided by 6)
2006-09-28 00:30:58 · answer #7 · answered by Anonymous · 0⤊ 0⤋
no the ans is not -1 upon 6.the value of x =3/2(3 upon 2).
8x-5=4x+4-2x
= 8x-4x-5=4-2x (transposing 4x from LHS to RHS)
=8x-4x+2x=4 (transposing -2x from RHS to LHS)
=8x-4x+2x=4+5(transposing -5 from RHS to LHS)
=6x=9 (carrying out the nessecary operations....subraction,addition........)
we get:
x=9/6(transposing 6 from LHS to RHS.........in LHS 6 is carrying out multiplication with 'x'.when it goes 2 RHS it will carry out division.)
simplifying 9/6....we get x=3/2
2006-09-28 00:51:48 · answer #8 · answered by Kishore 3 · 0⤊ 0⤋
8x-5=4x+4-2x
8x-5=4x-2x+4
8x-5=2x+4
8x-5 (+5)=2x+4 (+5)
8x=2x+9
8x (-2x)=2x+9 (-2x)
6x=9
x=3/2
2006-09-28 00:33:29 · answer #9 · answered by Jen k 2 · 0⤊ 0⤋
the answer is 9/6, you have to get all the x terms on one side and all the other integers on the other side, then divide the regular integers by the coefficient thats comes before x to get the value of x
2006-09-28 00:37:55 · answer #10 · answered by saga_child 3 · 0⤊ 0⤋