help
2007-10-16 10:25:52 · 9 answers · asked by hunedip22 1 in Science & Mathematics ➔ Mathematics
- 15 = 3x
x = - 5
2007-10-18 11:08:36 · answer #1 · answered by Como 7 · 0⤊ 0⤋
OK - key is to combine and get x on one side
2x-3=5x+12
2x = 5x + 15
-3x = 15
x= -5
Check
2(-5) -3 = 5(-5) + 12 ??
-10-3 = -25 +12 ?
-13 = -13 YES!!
Hope this helps.
2007-10-16 10:33:33 · answer #2 · answered by pyz01 7 · 0⤊ 0⤋
first add three to both sides thus
2x+3-3=5x+12+3 so
2x=5x+15 then subtract 5x from both sides
2x-5x=5x-5x+15 so
-3x=15 now divide by -3
x= -5
2007-10-16 10:35:39 · answer #3 · answered by dreddnot 1 · 0⤊ 0⤋
2x-3=5x+12
+5x -3
7x=9
2007-10-16 10:34:51 · answer #4 · answered by irishdancergirl1994 1 · 0⤊ 0⤋
Okay, first what you do is subtract 2x from both sides. This gives:
-3 = 3x + 12
Now, subtract 12 from both sides. This gives:
-15 = 3x
Divide both sides by 3 and you get:
x = -5
2007-10-16 10:29:45 · answer #5 · answered by Anonymous · 0⤊ 0⤋
Subtract 5x from both sides and add +3 to both sides, so the x expressions vanish on the right side of the equation, and the numbers from the left: (2x - 3) - 5x + 3 = (5x + 12) - 5x + 3 (2x - 5x) + (-3 + 3) = (5x - 5x) + (12 + 3) -3x = 15 Now divide both sides by -3: -3x / (-3) = 15 / (-3) x = -5.
2016-05-22 23:50:09 · answer #6 · answered by Anonymous · 0⤊ 0⤋
2x-3=5x+12
or 2x-5x-3=5x-5x+12
or -3x-3+3=12+3
or -3x=15
or3x/3=-15/3
or x=-5 ans
2007-10-16 10:46:08 · answer #7 · answered by MAHAANIM07 4 · 0⤊ 0⤋
2x-3=5x+12
2x-5x=12+3
-3x=15
x=15/-3
x=-5==>answer
2007-10-16 10:31:04 · answer #8 · answered by freeky 2 · 0⤊ 0⤋
PAY ATTENTION IN CLASS.
2007-10-16 10:33:02 · answer #9 · answered by tamitofu1930 3 · 1⤊ 0⤋