My brother is taking pre-algebra and i can't remember a thing from my past...
1. 3x - 4/2 = 2(x + 3) - 4
2. 4x - (-1 + 3) = 2x - 1/2
the answer for the 2nd one must be written as a fraction, not a decimal. I think we got the rest of them right... I got a little stuck on both of those though.
2006-09-13 02:36:17 · 5 answers · asked by Calamity 2 in Education & Reference ➔ Homework Help
1. 3x - 4/2 = 2(x + 3) - 4
3x - 2 = 2x + 6 - 4 (distributing out the parenthesis)
3x - 2x = 2 + 2 (combine like terms)
x = 4
If you meant:
(3x - 4)/2 = 2(x + 3) - 4
3/2 * x - 2 = 2x + 6 - 4
3/2 * x - 2x = 2 + 2
-1/2 * x = 4
x = -8
2. 4x - (-1 + 3) = 2x - 1/2
4x - (2) = 2x - 1/2 (operations inside parentheses)
4x - 2x = 2 - 1/2 (combine like terms)
2x = 3/2
x = 3/4
if you meant:
4x - (-1 + 3) = (2x - 1)/2
4x - (2) = x - 1/2
4x - x = 2 - 1/2
3x = 3/2
x = 1/2
2006-09-13 02:42:06 · answer #1 · answered by ³√carthagebrujah 6 · 0⤊ 0⤋
1. x=4
2. x=3/2
2006-09-13 09:43:22 · answer #2 · answered by heretic 2 · 0⤊ 0⤋
1.
3x -4/2 = 2(x+3) -4
3x - 2 = 2x +6-4
3x-2x = 4
x=4
2.
4x -(-1+3) = 2x-1/2
4x -2x =2-1/2
2x = 3/2
x=3/4
2006-09-13 09:48:03 · answer #3 · answered by bostoncity_guy 2 · 0⤊ 0⤋
1. ----------
3x - 4/2 = 2x + 6 - 4
3x - 2x = 2 + 4/2
x = 2 + 2
x = 4
2. ----------
4x - (-1 + 3) = 2x - 1/2
4x - (2) = 2x - 1/2
4x - 2 = 2x - 1/2
4x - 2x = -1/2 + 2
2x = -1/2 + 4/2
2x = 4/2 - 1/2
2x = 3/2
x = 3/2 x 1/2
x = 3/4
Hope it helps :)
2006-09-13 09:59:41 · answer #4 · answered by Josh K 2 · 0⤊ 0⤋
1. x=4
2. x=1.5
2006-09-13 09:48:24 · answer #5 · answered by Sara 3 · 0⤊ 0⤋