I know this is probably really easy, but I'm a horrible algebra student. Could you please explain how to solve this? Thanks.
2007-03-06 08:05:12 · 15 answers · asked by a-ren 4 in Education & Reference ➔ Homework Help
Isolate the variables (you don't need the parenthesis there)
3x + 7 = 7x + 4
3x + 7 - 4 = 7x
7x - 3x = 3
4x = 3
x = 3/4
2007-03-06 08:08:56 · answer #1 · answered by Someone 4 · 2⤊ 1⤋
Begin : 3x+7 = 7x+4
Subtract 4 : 3x+7-4 = 7x
Subtract 3x: +7-4 = 7x-3x
Reduce : 3 = 4x
Divide by 4: 3/4 = x
X=3/4 or x=.75
2007-03-06 09:04:46 · answer #2 · answered by Wade C 1 · 0⤊ 0⤋
I put up the foil method first because I didnt see the darn equal sign...it should go something like this
(3x+7) = (7x +4)
3x-7x = -4x
-4x=4-7 = -3
-4x/3 = 4/3
Hmm my answer seems to be different than everyone elses...I haven't been in algebra for awhile but I thought that was they way to do it....isolate all terms on one side then solve
2007-03-06 08:19:22 · answer #3 · answered by Kelly 3 · 0⤊ 0⤋
3x + 7 = 7x + 4
Subtract 4 on each side
3x + 3 = 7x
Subtract 3x on each side
3 = 4x
Divide both sides by 4
x = 3/4 = 0.75
2007-03-06 08:17:47 · answer #4 · answered by grimmie895 2 · 0⤊ 0⤋
OK, try this:
(3x+7) = (7x+4)
-7 -7
3x = 7x-3
-7x -7x
-4x = -3
/-4 /-4
x = 3/4
2007-03-06 08:11:51 · answer #5 · answered by whatifgecko 3 · 0⤊ 0⤋
3x+7=7x+4
1. Subtract 4 from both sides of the equation: 3x+3=7x
2. Subtract 3x from both sides of the equation: 3=4x
3. Divide both sides by 4: 3/4= x
and there is your answer: x=3/4
2007-03-06 08:09:35 · answer #6 · answered by princesskae4 2 · 0⤊ 1⤋
(3x+7) = (7x+4)
3x+7 = 7x+4
3x+7-4 =7x+4-4
3x+3 =7x
3x+3-3x=7x-3x
3=4x
3/4=4x/4
3/4 = x
x = 3/4
2007-03-06 08:19:02 · answer #7 · answered by TGIF13 3 · 0⤊ 0⤋
u put the like terms 2gether. subtract 4 from both sides so u'll get 3x+3=7x then u subtract 3x from each side. so ull get 3=4x. then divide by 4 and get x = 3/4.
2007-03-06 08:15:52 · answer #8 · answered by lilmissusa 2 · 0⤊ 0⤋
3x+7=7x+4 (subtract 3x from both sides)
7=4x+4 (subtract 4 from both sides)
3=4x (dived both sides by 4)
3/4=x
2007-03-06 08:09:33 · answer #9 · answered by ¥¥Z 4 · 0⤊ 0⤋
(3x+7) = (7x+4)
(3x+7)-3x = (7x+4) -3x
7 = 4x+4
7-4 = 4x +4 -4
3 = 4x
3/4 = 4/4 x
3/4 = x
2007-03-06 08:11:35 · answer #10 · answered by eagleperch 3 · 0⤊ 0⤋