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

Tutors Answer Your Questions about Linear-systems (FREE)

Question 266434: Equation 1: y= 4x-11
Equation 2: 2x+y=7
What is answer solved by two tables, graphing and subsitution
Click here to see answer by rfer(16322)

Question 266489: 4x/5+3/2=2x
Click here to see answer by JBarnum(2146)

Question 266549: Why you are using minus(-)instead of plus(+) in substitution?
Click here to see answer by stanbon(75887)

Question 266549: Why you are using minus(-)instead of plus(+) in substitution?
Click here to see answer by Alan3354(69443)

Question 266555: 3x+4y=-14
5x-2y=-6
Click here to see answer by Alan3354(69443)

Question 266590: please help me solve for x and y
it takes bob the boy scout 10 hours to paddle upstream {against the current} a distance 15 miles. when he turns around he finds it only takes him 5 hour to paddle 22.5 miles with the current.how fast is bob's boat going in stilll water and what is the speed of the curent of the river?
please solve this problem right now!!!! thank you
Click here to see answer by drk(1908)

Question 266647: please this the last time i am asking for help.
solve for x and y.
during a techno-geek-store sale 6 blank video tapes and 12 blank dvd's cost $35.10.during the same sale, 8 blank video tapes and 3 blank dvd's cost $27.95. what was the cost of a blank video tape and the cost of a blank dvd?
please!please!please!help me!!!
Click here to see answer by drk(1908)

Question 266646: Not sure if I am doing this correctly:
8(y+3)=3(2y+12)
8y+24=6y+36
2y+24=12
Click here to see answer by Alan3354(69443)

Question 266646: Not sure if I am doing this correctly:
8(y+3)=3(2y+12)
8y+24=6y+36
2y+24=12
Click here to see answer by drk(1908)

Question 266663: 3x + 5y + 90
Click here to see answer by unlockmath(1688)

Question 266658: Not sure if I am doing this correctly:
8(y+3)=3(2y+12)
8y+24=6y+36
2y+24=12
Click here to see answer by Edwin McCravy(20056)

Question 266658: Not sure if I am doing this correctly:
8(y+3)=3(2y+12)
8y+24=6y+36
2y+24=12
Click here to see answer by unlockmath(1688)

Question 266669: F=(GMm)/d2 ;for d2
Click here to see answer by drk(1908)

Question 266704: okay i just don't know how to put this as an equation?
Rosa has $3.10 in nickles and dimes. She has 10 fewer nickels than she has dimes. How many dimes and nickels does she have?
Click here to see answer by stanbon(75887)

Question 266902: what is 30% of 150?
51.2 is 0.08% of what number?
38 is what percent of 5700?
Click here to see answer by rfer(16322)

Question 267097: One number exceeds another number by 26. the sum of these numbers is 64. What are these numbers? I need to know how to solve word problems like these, can you please walk me through the steps.
Click here to see answer by scott8148(6628)

Question 265804: how Do i solve s=t+4
2t+s=19
Click here to see answer by Alan3354(69443)

Question 267285: Solve using elimination method. Label each system as consistent or inconsistent.
Thank you.
w + 8s = - 42
-9w - s = -48
Click here to see answer by checkley77(12844)

Question 267387: y=-2x+6
Click here to see answer by unlockmath(1688)

Question 267575: Graph the equation and identify the y-intercept.
y=1/4x
Click here to see answer by rfer(16322)

Question 267607: 2x + 6y = 32
5x - 2y = 12
Click here to see answer by checkley77(12844)

Question 267425: i dont understand how to do this:
3x+2y=-6
x=y+3
Click here to see answer by ankor@dixie-net.com(22740)

Question 267858: t-u=1
t+v=2
v-u=7
Trying to help my daughter solve and am completely lost. I appreciate your help !

Click here to see answer by stanbon(75887)

Question 268057: how would I understand the the linear systems of by substutition. I am so confused bout that.The most confusing questions for me are for example:y=x-4 3x+2y=7
Click here to see answer by jim_thompson5910(35256)

Question 268175: Find equations in standard form of the lines through point P that are
A.) parallel to, and
B.) perpendicular to, line L.
P(0,3); L: x+y=5
Please help me. My teacher in school does not teach us, he tells us to read it and do it on our own and it seems simple but I'm not sure what to do.
Click here to see answer by richwmiller(17219)

Question 268267: 4 Cheeseburgers and two shakes cost a total of 7.90. Two shakes cost 15 cents more than one cheeseburger. How much is a cheeseburger and the shake?
Click here to see answer by scott8148(6628)

Question 268316: how to solve this:y=3x
x=3y

Click here to see answer by alexisss1303(1)

Question 268347: Rewrite each equation in slope-intercept form. Then graph it.
2/3x-1/2y=2

Click here to see answer by rfer(16322)

Question 268358: ata high school basketball game, 400 tickets are sold. adult tickets cost 5 dollars and student tickets cost 2.50. if the totla amount collected was 1375 how many student tickets were sold?
Click here to see answer by rfer(16322)

Question 268214: how do i find the solution using substitution to:
15x-10y=-1
15y=-2+5x
Click here to see answer by ankor@dixie-net.com(22740)

Question 268354: the sum of the ages of petra and her mother is 53. her mother is 11 years more thean twice as old as petra. how old is petra and her mother?
Click here to see answer by rfer(16322)

Question 268762: 9x - 6y = -12
x + 2y= 0
how do you solve the system of equations by elimination
Click here to see answer by persian52(161)

Question 268761: 5x + 3y = -10
3x + 5y= -6
how do you solve the system of equations by elimination
Click here to see answer by persian52(161)

Question 268758: 7x + 4y = -4
5x + 8x = 28
how do you solve the system of equations by elimination
Click here to see answer by persian52(161)

Question 268362: Graph this equation:
x/2-y/3=1
Click here to see answer by persian52(161)

Question 268811: How do you solve:
Write an equation of a line which contains the points (4, -2) and (-1, -2).
Thank you
Click here to see answer by palanisamy(496)

Question 268805: How do you solve:
Write an equation of a line which contains the points (3, -2) and (3,6).
Thank you
Click here to see answer by Edwin McCravy(20056)

Question 268813: How do you solve:
Solve the following system graphically. Sketch the graphs and label the point of intersection. State the solution of the system.
2x-y= 4
x+3y= 9
Thank you
Click here to see answer by user_dude2008(1862)

Question 268987: how do you rearrange this problem? 2x + y + 1 = 0
x + 3y + 3 = 0

and this one to? 2x - y - 8 = 0
x + 3y + 3 = 0
Click here to see answer by drk(1908)

Question 269048: I do not even know were to start for this problem because i only know how to solve problems of two equations with two variables. I would like to know how to solve it as well as a answer for x,y, and z

x + y + z = 1
5x + 4y + 4z = 6
4x + 5y + 6z = −3
Click here to see answer by Alan3354(69443)

Question 269192: laura has $4.50 in quarters and dimes. She has 3 more dimes than quarters.How many quarters does she have?
Click here to see answer by suhasbhat(3)

Question 269247: find the intercepts of the graph of the equation
Click here to see answer by persian52(161)

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