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

Tutors Answer Your Questions about Linear-systems (FREE)

Question 57175: find the slope of the line through (-5,2) (-5,-3)
Click here to see answer by checkley71(8403)

Question 57182: find the slope of the line through (-5,2) (-5,-3)
Click here to see answer by stanbon(57290)

Question 57293: Solve the system by using the addition method. -0.1x+0.05y=5 and 0.05x+0.06y=2.7 What is x?
Click here to see answer by funmath(2925)

Question 57231: solve the system using the linear combination method: 5x+y=6 -5x+3y=-22
Click here to see answer by funmath(2925)

Question 57386: If possible, express answer as ordered pair x,y, of linear equation.
3x - 5y=1
10y=6x -1
this is as far as I have got.
10y - 6x+ -1
Please help
Thanks,
dnn
Click here to see answer by funmath(2925)

Question 57405: 3[a+3(a+5)] i need help i am not sure this is worked out.
Click here to see answer by checkley71(8403)

Question 57431: please help by solving the system by graphing
x-y=2
3x-3y=6
please graph together for me, I just can not seem to figure out which order they should fall.
Click here to see answer by funmath(2925)

Question 57428: y/y-5 = 7/2
Click here to see answer by Nate(3500)

Question 57443: 63. -6x-3[2x-5(x+8)]-6 and 65. 1/2(x+3)+1/3(3x+6) these two problems i am not sure how these are worked out.
Click here to see answer by stanbon(57290)

Question 57448: i am having problems solving these 3 problems #65 1/2(x+3)+1/3(3x+6) and #67 12x/5(5/12)+(-6x)(-1/6) and #69 -8/8(7xsquare/8)+1/3(3xsquare)+(3xsquare/4)(4/3) please help me. thanks!!!
Click here to see answer by stanbon(57290)

Question 57471: can you show me how these expression by combining like terms are worked?
#95. (-4x)(1/2)+(22y)(1/11)
#97. 3(1/3x-2x+1/6)
#99. -1/3(3y-6)+4(y+3)
#101. 4(3x two square-5x+2)
thanks alot!!!
Click here to see answer by ChillyWiz(11)

Question 57487: 127. -1/4a=2/5 please explain how to work this problem. thanks!!
Click here to see answer by rcmcc(152)

Question 57511: please help me in solving this problem #155 4/3(3x-1)-2x=8/3
thanks!
Click here to see answer by rcmcc(152)

Question 57742: Ver confused with this one Solve sytem of linear equation express in ordered pai (x,y) if possible use substitution or addition method
x- 5/3y=7
4/7x + y=-13/7
thanks, please show me steps
dnn
Click here to see answer by stanbon(57290)

Question 57741: system of linear wquations. solve in substitution or addition method there is no book if possible express in ordered pair
3x-5y=1
10y=6x-1
thanks,
dnn
Click here to see answer by checkley71(8403)

Question 57821: Solve the system by addition.
x + y = 6
x – y = 4
no book, thanks so much for all you do!!!
Click here to see answer by funmath(2925)

Question 57851: decide whether lnes p1 and p2 are perpendicular:
line p1:y= 3x + 5
line p2: y= 1/3x + 5
Click here to see answer by funmath(2925)

Question 57773: Y=2/3x and Y=-2/7x+4/7
I am not even sure how to set this up. Do I need to have the y-intercept for the first system of equation befor I can solve? Can you please help me set this problem up? Thanks for your help!
Click here to see answer by phillv(13)

Question 57926: i need help with solving y= mz + b, for m ..........?
Click here to see answer by stanbon(57290)

Question 57924: -2[3a-2(4a-1)]+2=2a+3-3 please help me solve this problem i am having alot of trouble. thanks much!
Click here to see answer by tutorcecilia(2152)

Question 57946: 13. x/3-5/6=-3/2
15. x/9-2/3=1/4
17. x/7-1/2=1/14
19. x/6-2/9=-5/12
please help me solve these problems i am getting confused. thanks!!!
Click here to see answer by stanbon(57290)

Question 57959: 23. 5x/4+3.2=0
29. 2(x-1.2)=7.8
31. 3.2(5-x/2)=-4.8/0.3
33. x+2/5=0.06
35.3x/4-1.2=x/3+2.5

please help me with these problems i am getting confused. thanks,thanks much!
Click here to see answer by stanbon(57290)

Question 58033: Can someone help me on this problem?
I need to find values for m and b in the following system so that the solution to the system is (-3, 4).
5x + 7y = b
mx + y = 22
Thanks so much,
Sher
Click here to see answer by rcmcc(152)

Question 58035: Can someone help me on ths problem?
I need to solve the following systems by addition. If a unique solution does not exist, I need to state whether the system is inconsistent or dependent.
2x + 3y = 1
5x + 3y = 16
Thanks so much,
Sher
Click here to see answer by stanbon(57290)

Question 58032: Can someone help me on this problem?
I have to solve the following systems by graphing:
3x - 6y = 9
x - 2y = 3
Can someone help with the graph since I have to send this on the computer and can't use paper.
Thanks so much,
Sher
Click here to see answer by funmath(2925)

Question 58048: I've been working on the equation: 2x-3y=24 2x+y=8. I find x when i do the equation my way, and the way i've been shown on this site, but i end up with -5y=16, and i get stucc there.
Click here to see answer by rcmcc(152)

Question 58081: Can anyone help me on this problem?
I need to solve the following systems by addition. If a unique solution does not exist, I need to state whether the system is inconsistent oor dependent.
x + 5y = 10
-2x - 10y = -20
Thanks so much,
Lisa
Click here to see answer by stanbon(57290)

Question 58202: x+y=4
y=2X+1
Click here to see answer by rcmcc(152)

Question 58116: I need some help on this problem please,
I need to solve the following systems by substitution:
8x - 4y = 16
y - 2x - 4
Thank you,
Lyn
Click here to see answer by checkley71(8403)

Question 58127: Can someone help me on this problem?
I need to solve the following systems by substitution:
4x - 12y = 5
-x + 3y = -1
Thanks,
Lyn
Click here to see answer by ankor@dixie-net.com(15646)

Question 57957: Solve each system in three variables form
x+2y-z=5
-3x-2y-3z=11
4x+4y+5z=-18
Click here to see answer by ankor@dixie-net.com(15646)

Question 58323: I am working on systems of linear equations, which I have until now been able to complete by using substitution or elimination methods. Now, however, my homework requires me to solve systems with more than two equations. This problem has three equations, each representing a side of a triangle, and is asking for the three coordinates for the vertices.
I founnd the points at which the first line intersects with the other two (seperately), but do not know how to determine the third vertex.
HERE ARE THE EQUATIONS:
x-y=7
3x-11y=-1
x+y+1=0
AND HERE IS MY WORK THUS FAR:
x-y=7
x=7+y

3(7+y)-11y=-1
21+3y-11y=-1
21-8y=-1
-8y=-22
y=2.75
3x-11(2.75)=-1
3x-30.25=-1
3x=29.25
x=9.75
the point for this vertex is (9.75, 2.75)

7+y+y+1=0
8+2y=0
2y=-8
y=-4
x+-4+1=0
x-3=0
x=3
the point for this vertex is (3,-4)
**so i was able to find these two vertices by substitution method, but do not know how to determine the third one. If any tutor could work on this and send me a solution ASAP, so that I am able to complete the rest of the problems, I would greatly appreciate it!!
With much gratitude and thanks,
A STUDENT
Click here to see answer by funmath(2925)

Question 58358: problem is: 4x+12=-7y
-y+12=4x

what i think the answer is 8x+-y=12 8x divided by 8
-8 -8 24 divided by 8
y=4 x=3

i am not sure if this is correct can this please be checked. THANK YOU!
Click here to see answer by stanbon(57290)

Question 58363: solve the following equations and express the answer as an ordered pair if possible
2x-4y=8
x-2y=4
Click here to see answer by funmath(2925)

Question 58504: In a town election, the winning candidate had 220 more votes than the loser. If 810 votes were cast in all, how many votes did each candidate receive?
Click here to see answer by faceoff57(82)

Question 58502: A washer-dryer combination costs $1200. If the washer costs $220 more than the dryer, what does each appliance cost separately?
Click here to see answer by faceoff57(82)

Question 58525: solve the following system of linear equations and if possible express your answer as an ordered pair

y=2x+1
x+y=4
Click here to see answer by funmath(2925)

Question 58667: Could someone help me on this problem?
I need to solve the follwing systems by substitution:
8x -4y = 16
y = 2x -4
Thanks,
Sher
Click here to see answer by Cintchr(481)

Question 58529: hi, i need some help solving this equation and if possible expressing my answer as an ordered pair
x-5/3y=7
4/7x+y= -13/7
Click here to see answer by funmath(2925)

Question 58851: Could someone be so kind in helping me with this problem?
I need to solve the following systems by substitution:
8x - 4y = 16
y = 2x - 4
Thank you so much,
Ashley
Click here to see answer by funmath(2925)

Question 58854: Could someone be so kind in helping me with this problem?
I need to solve the following systems by substitution:
4x - 12y = 5
-x + 3y = -1
Thanks so much,
Ashley
Click here to see answer by funmath(2925)

Question 58928: What is the slope-intercept if the line with y intercept 2 and perpendicular to 3x + 2y=6?
Click here to see answer by uma(370)

Question 58913: Solve:
4x^2+1=2x
Click here to see answer by aaaaaaaa(138)

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