Last math question, I promise. If someone could explain this I would appreciate it.
Many thanks.
2007-07-24 13:16:48 · 7 answers · asked by andrew l 2 in Science & Mathematics ➔ Mathematics
3x – 4 + 7 – x = 13 – 4x + 2 + x
3x - x + 4x - x = 13 + 2 + 4 - 7
5x = 12
x = 12/5
2007-07-24 13:21:18 · answer #1 · answered by fofo m 3 · 1⤊ 0⤋
Hey there!
Here's the answer.
3x-4+7-x=13-4x+2+x --> Write the problem.
3x-x-4+7=-4x+x+13+2 --> Gather the x terms together and the constant terms together.
2x+3=-3x+15 --> Simplify the above equation.
5x+3=15 --> Add 3x on both sides of the equation.
5x=12 --> Subtract 3 on both sides of the equation.
x=12/5 --> Divide both sides of the equation by 5.
x=2.4 Write the answer in a decimal.
So the solution is x=2.4 or x=12/5.
Hope it helps!
2007-07-24 20:28:08 · answer #2 · answered by ? 6 · 0⤊ 1⤋
Simplify to start.
3x-x=2x
-4+7=3
13+2=15
-4x+x=-3x
The equation is now
2x+3=15-3x
Add 3x
5x+3=15
Subtract 3
5x=12
x=12/5 or 2.4
2007-07-24 20:22:24 · answer #3 · answered by llllarry1 5 · 0⤊ 0⤋
2x + 3 = 15 - 3x
5x = 12
x = 12 / 5
2007-07-28 05:30:05 · answer #4 · answered by Como 7 · 1⤊ 0⤋
-2
2007-07-24 20:19:58 · answer #5 · answered by person p 1 · 0⤊ 0⤋
hot caramel.
2007-07-24 20:25:18 · answer #6 · answered by Bri the Pilot 3 · 0⤊ 1⤋
sure u do.........
i got 5x=12
2007-07-24 20:23:20 · answer #7 · answered by Anonymous · 0⤊ 0⤋