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

Tutors Answer Your Questions about Linear-systems (FREE)

Question 257174: What's the answer for :
3x + y = 1
x - 2y = 5
Click here to see answer by Fombitz(32388)

Question 257178: What's the answer for :
3x + y = 1
x - 2y = 5
Click here to see answer by dabanfield(803)

Question 257147: A bank teller cashed a check for $630 using $10 bills and $20 bills. The teller handed 21 more $10 bills than $20 bills to the customer, Determine how many bills of each denomination were handed to the customer.
Click here to see answer by dabanfield(803)

Question 257175: What's the answer for :
3x + y = 1
x - 2y = 5
Click here to see answer by unlockmath(1688)

Question 257370: determine if the equation is linear and if it is put it in standard form 9y = 4x - 18
Click here to see answer by drk(1908)

Question 257487: 12a^2 + 36b^2 -43ab=0 factorize it
Click here to see answer by drk(1908)

Question 257475: 3x+8y=20
3x+6y=14
Click here to see answer by checkley77(12844)

Question 257541: Please answer this: (-8,6);y = -1/4x + 5

Click here to see answer by Alan3354(69443)

Question 257569: decide whether the pair of lines is , parallel, perpendicular, or none....
4x+3y=10
3x+4y=2
Click here to see answer by stanbon(75887)

Question 257603: y=x+1
-x=y=3
Click here to see answer by Alan3354(69443)

Question 257599: y=-x+5
x+y=5
Click here to see answer by Alan3354(69443)

Question 257661: Of larger of two numbers is divided by the smaller, the quotient & remainder are 2 each. if 5 times the smaller number is divided by the larger number, the quotient & remainder are still 2 each. Find the two numbers
Click here to see answer by ankor@dixie-net.com(22740)

Question 257706: I don't understand how systems of linear equations work, please explain it to me
Click here to see answer by richwmiller(17219)

Question 257696: -4c minus 2d equals -2 (first equation)
2c minus 2d equals -14 (second equation)
how do i solve this? the section is calle elimination using adding and subtracting
Click here to see answer by richwmiller(17219)

Question 257659: -4<5x+6<21
Click here to see answer by checkley77(12844)

Question 257657: Show and check work.
-3(4-x)=5-(x+1)
Click here to see answer by checkley77(12844)

Question 257963: The distance between two stations is 340 km. Two trains start simultaneously from these stations on parallel tracks to cross each other. The speed of one of them is greater than the other by 5km/hr. If the distance between the two trains after 2 hours of their start is 30 km; find the speed of each train.
Click here to see answer by richwmiller(17219)

Question 257958: A is now 9 years older than B. In 10 years, A will be twice as old as B was 10 years ago. Find their present ages.
Click here to see answer by richwmiller(17219)

Question 257960: Find an equation of the line containig the given pair of points. (3,5) (9,9)
9/9-5/3=4/6= 2/3x? can you help me solve this?
Click here to see answer by checkley77(12844)

Question 258048: Solve for x
y=negative two thirds x + 8
Click here to see answer by richwmiller(17219)

Question 258060: solve for x
y = (-2/3x) + 8
Click here to see answer by richwmiller(17219)

Question 257938: solve:1/2(3-8x)>20(1-1/5x)

Click here to see answer by checkley77(12844)

Question 258180: please help me solve
y=3x-4
-6x+2y=-8
Click here to see answer by ankor@dixie-net.com(22740)

Question 258240: 3 system..
x+2y+5z= -1
2x-y+z=2
3x+4y-4z=14
HELP ME PLEASE!
Click here to see answer by Edwin McCravy(20056)

Question 258303: Sloving a system of Linear equation find the value of x and y. can someone please show me the steps I need to be able to capture the information. Thanking you in advance,.
-7x -6y = 10
3x - 2y = 14?
Click here to see answer by jmorgan22(8)

Question 258373: how do i graph each equation below on coordinate plan?
x=600

Click here to see answer by richwmiller(17219)

Question 258468: please solve this type of linear equation
5p - 28

4
= 2

Click here to see answer by Alan3354(69443)

Question 258462: (-2,7) 2x-5y=3
the instructions say: write the slope-intercept form of an equation that passes through the given point and is perpendicular to the graph of each equation
Click here to see answer by checkley77(12844)

Question 258522: alright here goes lol. i tryed to solve it and came up with some strange answers.
1. 4x+2y+z=7
2x+2y-4z=-4
x+3y-2z=-8
My attempts: (sorry for the confusing factor x.x)
(4x+2y+z=7)4
2x+2y-4z=28
_____________
2x+2y=-4
16x+8y+28
___________
18x+10y=24
(4x+2y+z=7)2
x+3y-2z=-8
____________
8x+4x+2z=7
(9x+7y=-1)-2
18x+10y=24
____________
-18x-14y=2
18x+10y=24
___________
-4y = 26
___ ___
-4 -4
y=-6.5
18x+10(-6.5)=24
18x-65=24
__________
18x=89
x=4.94
4(4.94)+2(-6.5)+z=7
19.70-13+z=7
6.76+z=7
z=.24
thats it. im sorry its so confusing. im so very confused about this stuff so please help x.x
Click here to see answer by drk(1908)

Question 258611: Solve the system:
3x-2y+2z=5
6x+3y+2z=-1
9x-y-4z=5
Click here to see answer by Edwin McCravy(20056)

Question 258775: Solve this problem by using a two order system.
One of two complementary angles is 8 degrees less than the other.
The numbers are__?__degrees and __?__degrees .

Click here to see answer by richwmiller(17219)

Question 258794: solve the system of linear equations:
4x + 10y = -28
6x + 7y = 6
Click here to see answer by unlockmath(1688)

Question 258874: x=-4
5x2=4y+3x2-8
Click here to see answer by drk(1908)

Question 259161: I need to solve this equation graphicaly as well as the regular answer.
I think I may have got the regular answer.It reads "To graph an equation of the form Ax+By=C"
the problem is 2X-y=3 This is how I figured the problem:
2X-y=3
-y=-2X+3
Y=2X-3
Then I have to figure out how to graph the equation. Any help be very helpful.
Click here to see answer by rfer(16322)

Question 259399: What defining relationship holds between a, b and c if c is the quotient of a divided by b?
Click here to see answer by Fombitz(32388)

Question 259434: Solve the folloing systems of equations using the substitution method and check
3a+b=4
a-2b=6
please help
Click here to see answer by stanbon(75887)

Question 259528: How can you solve for a slope when you dont understand how? What is the easiest way to understand solving for slopes?
I need an example i can have with me in class. Using the mathod algebra teachers use.
Click here to see answer by Alan3354(69443)

Question 259538: state college has 620 stundent. there are 20 more women than men . how many women were there"
Click here to see answer by drk(1908)

Question 259591: Hi I need a little refresher in point-slope and slope intercepter and need the full steps with Slope = –5, passing through (–4, –2) and Slope = –2, passing through (0, –3)
Thank you
Click here to see answer by scott8148(6628)

Question 259603: 4x-y+z+-5 2x+2y+3z+10 5x-2y+6z+1 solve the system

Click here to see answer by Fombitz(32388)

Question 259752: (5x+4y=7)+(x-3y=9)
getting answers for x and y that dont seem quite right.
Click here to see answer by richwmiller(17219)

Question 259750: Solve each system by addition.
2x=2-y)+(22x+36y=356)
i got a decimal for y and i didnt think it was right.

Click here to see answer by richwmiller(17219)

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