Questions on Algebra: Systems of Linear Equations answered by real tutors!

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Question 53676: 4&2/3 / 12
Click here to see answer by rchill(405)

Question 53762: I have the following problem to solve and cannot figure it out. Please Help!!!
Solve. 3(x-2)-2x = x-6
Click here to see answer by checkley71(8403)

Question 53733: 6(y+2)-4+-10

I have no idea what to do...thanks if you can help me out...
Click here to see answer by aaaaaaaa(138)

Question 53858: explain to me how you solve x+3/2=15

Click here to see answer by checkley71(8403)

Question 54016: I have the following word problem and really do not know where to begin figuring it out, using algebra anyways. Please Help!!
Allen bought 20 stamps at the post office in 37� and 20� denominations. If the total cost of the stamps was $7.06, how many 37� stamps did Allen buy?
Click here to see answer by stanbon(75887)

Question 54023: Section title is Puzzle Problems.
A number between 300 and 400 is forty times the sum of its digits. The tens digit is 6 more than the unit digit. find the number. Found the answer as 360, but can't figure out all of the steps
Click here to see answer by Nate(3500)

Question 54121: I have to do the following problem and I'm not sure if I have it correct.
Is -4 a solution to the equation 7x - 5 + 3x = 6 + x - 10?
This is what I have done:7(-4) - 5 + 3 (-4) = 6 + (-4) - 10
28 - 5 + -12 = 10 - 10
23 + -12 = 10 - 10
-11 = 0
So my answer is No it is not a solution to the equation. Is this correct? Please Help!!!!
Click here to see answer by jake_6233(74)

Question 54154: factor
W 2 + 12 w + 20
Click here to see answer by checkley71(8403)

Question 54155: Factor completely
U 4 W 3 - 16 w 3
Click here to see answer by rchill(405)

Question 54221: 3/4-3/5x=2/5x+2/4
I'm not so good at fractions...
Click here to see answer by checkley71(8403)

Question 54220: 1/8-3/4x=1/16
I'm not used to fractions...
Click here to see answer by funmath(2933)

Question 54337: write the equasion, which if plotted would be parallel to y=2x and cuts the y axis at (0,4)
Click here to see answer by funmath(2933)

Question 54363: Hello! I need help doing word problems. Its like when I;m presented with a word problem I don't know where to start first, what to do next. Please help on these two problems. Please help me understand it.
1. Steven is travelng to a computer convention by car. His compnay will reimburse him $ .29 per mile. If Steven travels 890.5 miles, how much will he receive from his company?
Please Help, Thank You
Click here to see answer by stanbon(75887)

Question 54398: I am having trouble understanding system of equations. i have tried to work the problem out but im not sure what steps to take. can you help me on the problem 3x/2 + y/4=7
x/5 - 2y/3 = 2 1/3
Click here to see answer by Edwin McCravy(20056)

Question 54431: I do not know how to work this problem. I would appreciate your help.
Find values for m and b in the following system so that the solution to the system is (-3,4).
5x + 7y = b and mx + y = 22

Click here to see answer by venugopalramana(3286)

Question 54436: I need help. Solve the following system by using either addition or substitution. If a unique solution does not exist, state whether the system is dependent or inconsistent.
10x + 2y = 7 and y = -5x + 3

Click here to see answer by Edwin McCravy(20056)

Question 54435: Please help. I don't understand this.
Solve the following system by substitution. If a unique solution does not exist, state whether the system is inconsistent or dependent. 4x � 12y = 5 and -x + 3y = -1
Click here to see answer by funmath(2933)

Question 54434: I need your help please.
Solve the following system by substitution. If a unique solution does not exist, state whether the system is inconsistent or dependent. 8x � 4y = 16 and y = 2x - 4
Click here to see answer by tiffanyc(9)

Question 54433: I need your help with this please.
Solve the following system by substitution. If a unique solution does not exist, state whether the system is inconsistent or dependent. 5x � 2y = -5 and y � 5x = 3
Click here to see answer by stanbon(75887)

Question 54432: I do not understand how to solve this, please help.
Solve the following system by addition. If a unique solution does not exist, state whether the system is inconsistent or dependent.
x + 5y = 10 and -2x � 10y = -20

Click here to see answer by funmath(2933)

Question 54421: Solve the system by substitution:
x-2y=6
y=2x-6
Click here to see answer by funmath(2933)

Question 54593: can you please help i forgot how to do this
Solve each equation by the subtraction method. Determine whether the equation are independent, dependant, or inconsistent.
28. x =y + 4
3y � 2y = 4
thank you in advance

Click here to see answer by funmath(2933)

Question 54681: A principal of $2500 is invested; part at 8% per annum and the rest at 12% per annum. In one year, the two investments earned equal amounts of interest. How much was invested at each rate?
Click here to see answer by checkley71(8403)

Question 54689: 1.12x + 1.08y = 0
x+y = 500
No clue where to start. Please help.
Click here to see answer by checkley71(8403)

Question 54707: A crate of grapefruit has a total mass of 4 kg. When 12 grapfruit are removed, the total mass is 3kg. Determine the mass of the crate and of the grapefruit.
I have an answer but i'm just making sure. Thx
Click here to see answer by Nate(3500)

Question 54827: Paul works for $6 an hour on weekdays, and makes $7 on weekends. Last week he made $250 for 40 hours. Determine how many hours he worked during the week and how many during the weekend.
Click here to see answer by checkley71(8403)

Question 55055: Hi, the question i have is that a computer is purchased at end of 1999 for $3000. Scrap value of the computer in 2001 is expected to be $500. Find a linear function that describes the value of the computer, if t is the age of the computer in years.
I wouldn't know where to start!! thanks.
Click here to see answer by Hook(36)

Question 55067: Solve the system by graphing, addition and substitution methods. x + y = 3, x + y = �1
Click here to see answer by funmath(2933)

Question 52598: Here is the problem:
Find the solution to the following systems of equations:
3x-2y+4z=8
x-y-2z=5
4x-3y+2z=13
Click here to see answer by rchill(405)

Question 52607: 2x+4y=6
7x+4+3y
Click here to see answer by rchill(405)

Question 52021: Hi, i have the following question that I have to dertime the linear function
f(t) with slope= -1 and f(2)=1.
thanks for the help
Click here to see answer by rchill(405)

Question 51923: -x+5-3x-1=-5x+2-9x
Click here to see answer by rchill(405)

Question 51456: What form does the solution(s) of an independent system of two linear equations in two variables take and where do you find the solution(s) on a graph?

Click here to see answer by rchill(405)

Question 51328: Solve each of the following systems by addition. If a unique solution does not exist, state whether the system is inconsistant or dependent.

2x + 3y = 1
5x + 3y = 1=
and this one too please!
x + 5y = 10
-2x - 10y = -20
Thank you so much for your help.
littletornado52
Click here to see answer by rchill(405)

Question 50994: x+3
___
2 = y
Click here to see answer by rchill(405)

Question 50289: How do I solve the following system by graphing?? Please help
3x-6y=9
x-2y=3
Tried using the plotter online and it does not have a way to input this kind of problem. Or at least I do not know what I am doing to figure it out.

Click here to see answer by rchill(405)

Question 50177: Need help solving the following system by graphing.
3x-6y=9
x-2y=3
Click here to see answer by rchill(405)

Question 49935: y/8+y/12=-4
Click here to see answer by rchill(405)

Question 49349: Please help by solving the following system by graphing

2x-y=4
2x-y=6
Click here to see answer by rchill(405)

Question 49350: Please help solve the following system by graphing
x-2y=8
3x-2y=12
Click here to see answer by rchill(405)

Question 49042: I have a graph plotted (7,5) and (8,3) , horizontal axis is D and vertical axis is P. i need to get the equation of the line joining these points, i.e) P= 1d - 2 but it isnt that and i cant work it out, any help would be appreciated.
Click here to see answer by rchill(405)

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