i really don't know how to do this, and i really need to know the answer of this and the solution or formula. please help me, this kind of question will be in my exam tomorrow
solve for x 0.05x + 0.35(30-x) = 3.3
solve for x 0.05x + 0.35(30-x) = 3.3?
2008-12-08 11:25 am
回答 (6)
2008-12-08 2:16 pm
✔ 最佳答案
0.05x + 0.35(30 - x) = 3.30.05x + 10.5 - 0.35x = 3.3
0.05x - 0.35x = 3.3 - 10.5
-0.3x = -7.2
x = -7.2/-0.3
x = 24
2008-12-08 11:37 am
0.05x + (0.35*30) - (0.35*x) = 3.3
0.05x + 10.5 - 0.35x = 3.3
(0.05x - 0.35x) + 10.5 = 3.3
-0.30x = 3.3 - 10.5
-0.30x= - 7.2
x = -7.2 divided by -0.30 (times both nominator and denominator by 10)
x = -72 divided by -3
x = 24
0.05x + 10.5 - 0.35x = 3.3
(0.05x - 0.35x) + 10.5 = 3.3
-0.30x = 3.3 - 10.5
-0.30x= - 7.2
x = -7.2 divided by -0.30 (times both nominator and denominator by 10)
x = -72 divided by -3
x = 24
2008-12-08 11:35 am
5x + 35(30 - x) = 330
5x + 1050 - 35x = 330
720 = 30 x
x = 24
5x + 1050 - 35x = 330
720 = 30 x
x = 24
2008-12-08 11:35 am
0.05x + 0.35(30-x) = 3.3 OR x = (0.35*30--3.3)/(0.35--0.05) = 24
2008-12-08 11:30 am
0.05x + 10.5 - 0.35x = 3.3
0.3x=7.2
x=24
0.3x=7.2
x=24
2016-10-15 6:55 pm
3(x + a million) + 6 = 33 3x + 3 + 6 = 33 <- Multiply the three to the (x + a million) 3x + 9 = 33<- upload "like" words (subsequently it relatively is the three and six to get 9) 3x = 24 <- subtract the 9 from the 33 x = 8 <- divide the 24 through the three to isolate the x
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