If x=12
12+9(3x+4)-56=56
What does x equal?
2006-09-05 09:20:06 · 8 answers · asked by ohdarliingletgo 2 in Education & Reference ➔ Homework Help
oh yea i forgot ur supose to find out if x really equals 11 or not u dont really have to find the real answer...we do that tomorrow
2006-09-05 09:33:12 · update #1
Well i think u have to see if x really equals 12 and it doesnt...im not sure what it equals but it doesnt equal 12
2006-09-05 09:25:54 · answer #1 · answered by Ashley010 5 · 0⤊ 0⤋
..!! x = 12!!
u just have to plug it in and see if it is correct:
12 + 9 (3 * 12 +4) - 56 = 56
12 + 9(40) - 56 = 56
12 + 360 - 56 = 56
316 does not equal 56.... so x does not = 12!!!
now, if u are just solving for x (w/o that x = 12 thing):
12 + 9(3x+4) - 56 = 56
12 + 27x + 36 - 56 = 56
27 x = 64
x = 64/27
2006-09-05 09:24:37 · answer #2 · answered by sasmallworld 6 · 0⤊ 0⤋
this is to see if 12 is the correct answer, just plug 12 in wherever you see x.
12+9[3(12)+4]-56=56
12+9[36+4]-56=56
21[36+4]-56=56
756+84-56=56
784=56
since this is not true, x does not =12. that is all you had to do.
2006-09-05 09:36:22 · answer #3 · answered by Anonymous · 0⤊ 0⤋
12 + 9(3x+4)-56=56
9(3x+4)=56+56-12
27x + 36=100
27x=100 - 36
x=64 / 27
x=2
That's without your x=12
With that, you dont really have to solve for x because you already said x equals 12.
2006-09-05 09:26:57 · answer #4 · answered by jubbablumberin 3 · 0⤊ 0⤋
X equal 6
2006-09-05 09:25:16 · answer #5 · answered by Anonymous · 0⤊ 0⤋
if you solve the second equation x turns out to be 2,37
according to the first one as you say X=12
the two of them are irrelevant
2006-09-05 09:25:27 · answer #6 · answered by girl24gr 3 · 0⤊ 0⤋
12, it says so in the question.
2006-09-05 09:24:54 · answer #7 · answered by laura_valsa 2 · 0⤊ 0⤋
sum not okay
2006-09-05 09:23:33 · answer #8 · answered by raj 7 · 0⤊ 0⤋