what is the value of x?
2007-06-13 13:38:49 · 21 answers · asked by Korina O 2 in Science & Mathematics ➔ Mathematics
20=8+36+12x
20=44+12x
-24=12x
-2=x
2007-06-13 13:43:35 · answer #1 · answered by leo 6 · 1⤊ 2⤋
First distribute over the brackets:
20 = 8 + 3 (12 + 4x)
20 = 8 + (3)(12) + (3)(4x)
20 = 8 + 36 + 12x
Then collect like terms together:
20 - 8 - 36 = 12x
-24 = 12x
Then divide by 12 to solve for x:
-24/12 = 12x/12
-2 = x
or: x = -2
2007-06-13 13:44:36 · answer #2 · answered by Jim E 2 · 1⤊ 0⤋
20=8+3(12+4x)
or 20=8+36+12x
or 20-44=12x
or x=-2
2007-06-13 23:49:05 · answer #3 · answered by Sumita T 3 · 0⤊ 0⤋
X= -2
First Multiply 12 and 3 to get 36. Also multiply 4x and 3.You are left with:
20=8 + 36+12x
Next add 36 and 8.
20=44+12x
Now subtract 44 from each side.
-24=12x
Divide each side by 12.
-2=x or x= -2
Hope that answered the question.
2007-06-13 13:45:11 · answer #4 · answered by Brian C 2 · 1⤊ 0⤋
20=8+3(12+4x) expand the brackets
20=8 +36+12x collect like numbers
20 =44 +12x move +44 across the = sign making it negative(-)
20 - 44 =12x simplify
-24 = 12x divide both sides by 12
-24/12 = 12x/12
-2 = x
2007-06-13 13:50:51 · answer #5 · answered by Kimchie 2 · 0⤊ 0⤋
20 = 8 + 3 (12+4x)
12 = 3 (12+4x)
4 = 12+4x
4 - 12 = 4x
-8 = 4x
x = -2
2007-06-13 13:45:33 · answer #6 · answered by kenraya_3686 2 · 2⤊ 0⤋
20 = 8 + 3 (12+4x)
12 = 3 (12+4x)
4 = 12+4x
4 - 12 = 4x
-8 = 4x
x = -2
2007-06-13 13:44:28 · answer #7 · answered by Anonymous · 1⤊ 0⤋
20 = 8 + 3(12 + 4x)
20 = 8 + 36 + 12x
20 = 44 + 12x
20 - 44 = 44 + 12x - 44
- 24 = 12x
- 24/ 12 = 12x / 12
- 24 / 12 = x
- 2 = x
- - - - - - -x-
2007-06-13 13:48:45 · answer #8 · answered by SAMUEL D 7 · 1⤊ 0⤋
X= -2
2007-06-13 13:41:47 · answer #9 · answered by e m 2 · 1⤊ 1⤋
multiply what is in the parentheses first to get rid of them... you will get 20= 8+36+12x
then add the 8 and 36 to get 20= 44+12x
next subtract 44 from both sides to get -24= 12x
finally divide 12 on both sides to get x alone
the answer is x= -2
2007-06-13 13:57:48 · answer #10 · answered by haught21 1 · 0⤊ 0⤋
20 = 8+3(12+4x)
-8 -8
12 = 3(12+4x)
/3 /3
4 = 12+4x
-12 -12
-8 = 4x
/4 /4
-2 = x
2007-06-13 13:43:40 · answer #11 · answered by Anonymous · 1⤊ 1⤋