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Tutors Answer Your Questions about Expressions-with-variables (FREE)
Question 22682: This is trying to find the value of the variable utilizing the shown numbers and symbols. I am severly unclear, but my instructor mentioned something about some of the equations having no solutions. Also, some questions can have infinite solutions. I am sorry that I cannot supply more information, but please assist me. Here is an example of a problem I tried to solve:
 Apparently, the variable must be a number that would make the two sentences equal, if it has a solution or infinate solutions as mentioned above.
This is how I tried to solve the problem:
+6 +6 <-------Add six to 11y and -6
16y-7y=5+4 <--------This was the sum that I got
-4 -4 <----Sustracted four from 16y and +4
12y-7y=5 <------This was my difference
+7 +7 <----Added seven to 12y and 5
19y/12=12/12 <-----19y divided by 12. 12 divided by twelve. 12 was discarted. The quotient of 19y and 12 is supposed to be the solution. In conclusion. I deemed this equation as having 'no solution', but I have a suspicion that my answer is wrong from human error. Thank you for helping.
Click here to see answer by stanbon(26259)   |
Question 22774: I am a parent trying to help my son figure out how to solve the following:
Bill is twice as old as his brother Dan. In 7 years Bill will be only one and one half as old as Dan. How old is Bill now?
I would like the details on solving so I can teach him properly.
Thank you.
Click here to see answer by longjonsilver(2297)  |
Question 22096: i need help with this one math problem i already did the problem but i don't think it's right and i would like for you to tell me whether it is or not and if it's wrong will you pleasze tell me what i did wrong. proiblem:
2x+-y=32
2x+y=60. the answer i got to this problem was 23,-45.
Click here to see answer by AnlytcPhil(958) |
Question 23160: If a home brewer has 3500mls of distilled alcohol at 80% proof how much water would he need to add to it to reduce it down to 50% proof?
I've solved this part. here are my values:
a=distilled alchohol in mls
b=proof in %
c=distilled alchohol+h2o in mls
d=h20 in mls
x=distilled alchohol in mils*proof in %
here are the steps i've used to get the h2o value
1. ab=x
2. 2x=c
3. c-a=d
my question to you math tutors is:
How can I simplify these equations into one unified equation that will solve any problem?
Click here to see answer by rapaljer(3612) |
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Older solutions: 1..45, 46..90, 91..135, 136..180, 181..225, 226..270, 271..315, 316..360, 361..405, 406..450, 451..495, 496..540, 541..585, 586..630, 631..675, 676..720, 721..765, 766..810, 811..855, 856..900, 901..945, 946..990, 991..1035, 1036..1080, 1081..1125, 1126..1170, 1171..1215, 1216..1260, 1261..1305, 1306..1350, 1351..1395, 1396..1440, 1441..1485, 1486..1530, 1531..1575, 1576..1620, 1621..1665, 1666..1710, 1711..1755, 1756..1800, 1801..1845, 1846..1890, 1891..1935, 1936..1980, 1981..2025, 2026..2070, 2071..2115, 2116..2160, 2161..2205, 2206..2250, 2251..2295, 2296..2340, 2341..2385, 2386..2430, 2431..2475, 2476..2520, 2521..2565, 2566..2610, 2611..2655, 2656..2700, 2701..2745, 2746..2790, 2791..2835, 2836..2880, 2881..2925, 2926..2970, 2971..3015, 3016..3060, 3061..3105, 3106..3150, 3151..3195, 3196..3240, 3241..3285, 3286..3330, 3331..3375, 3376..3420, 3421..3465, 3466..3510, 3511..3555, 3556..3600, 3601..3645, 3646..3690, 3691..3735, 3736..3780, 3781..3825, 3826..3870, 3871..3915, 3916..3960, 3961..4005, 4006..4050, 4051..4095, 4096..4140, 4141..4185, 4186..4230, 4231..4275, 4276..4320, 4321..4365, 4366..4410, 4411..4455, 4456..4500, 4501..4545, 4546..4590, 4591..4635, 4636..4680, 4681..4725, 4726..4770, 4771..4815, 4816..4860, 4861..4905, 4906..4950, 4951..4995, 4996..5040, 5041..5085, 5086..5130, 5131..5175, 5176..5220, 5221..5265, 5266..5310, 5311..5355, 5356..5400, 5401..5445, 5446..5490, 5491..5535, 5536..5580, 5581..5625, 5626..5670
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