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

Tutors Answer Your Questions about Linear-systems (FREE)

Question 541047: fined the values of x and y if: (enter the value of x for the first blank and the value of y for the second blank)
x+y=-4
4x-y=-6
Click here to see answer by oberobic(2304)

Question 541302: The number of ladies is 80 greater than the number of men. If there are 1310 people all together, how many gentleman are there?
Click here to see answer by Maths68(1474)

Question 541493: how do i get y by itself in the following equations?
x+2y=4
2x+y=0
Please explain step by step thankyou
Click here to see answer by friesr(113)

Question 541567: Can you put these into y=mx+b
5x+y=-4 and x-y=2
-0.45-y=1.35 and -1.8+y=-1.8
-0.4x=0.8y=-16 and 1.2x+0.4y=1
Click here to see answer by stanbon(75887)

Question 541812: What method did you use to solve this, so I can solve the next one.
2y = x + 1
�2x � y = 7

Click here to see answer by mananth(16946)

Question 542138: An interval has a notation of (6,8) find the midpoint
Click here to see answer by jim_thompson5910(35256)

Question 542490: Substitution
x+3y=7
3x=9-5y
Click here to see answer by friesr(113)

Question 542728: 3x=5y how do i do this and get the answer right??
Click here to see answer by Alan3354(69443)

Question 543015: Several students decide to start a T-shirt company. After initial expenses of $280, they purchase each T-shirt wholesale for $3.99. They sell each T-shirt for $10.99. How many must they sell to break even.
Click here to see answer by josmiceli(19441)

Question 543006: I've been trying to figure out the answer on the 3 variables equations but i can't find the solution. Supposibly the solution are whole numbers. Can you help me get the answer :
3a - 2b + 7c = 13
a + 8b - 6c = -47
7a - 9b -9c = -3
Click here to see answer by scott8148(6628)

Question 543094: how do u solve (3,1);{x+3y=6 {4x-5y=7

Click here to see answer by jpg7n16(66)

Question 542301: 2x + y = 5
x - y = 1
Click here to see answer by jpg7n16(66)

Question 539439: How Do You Solve This Problem In Substitution Method?
x + y = 4
Y=2x+1

Click here to see answer by jpg7n16(66)

Question 538430: I need to be shown the steps to solve a problem like {3x+2y=2 -2+2y=16}
Click here to see answer by jpg7n16(66)

Question 542189: use substitution method to solve linear system
x-2y=-25
3x-y=0
Click here to see answer by jpg7n16(66)

Question 538167: I need help working this problem out. I have no idea what I am doing.
4a + 2b - 6c = 2
6a + 3b - 9c = 3
8a + 4b - 12c = 6
Click here to see answer by jpg7n16(66)

Question 538670: My mom and I can't figure out how to solve this word problem.
Producing a musical costs $88,000 plus $5900 per performance. One sold-out performance earns $7500 in revenue. If every performance sells out, how many performances are needed to break even?
Here is what we tried:
y=7500x + 5900 y=88000
88000= 7500x + 5900
82100=7500x
10.94 shows
also tried:
x= 7500 x= 88000+5900
x=93900/7500
12.52 shows
I know I am doing something wrong. I'm really confused!
Click here to see answer by jpg7n16(66)

Question 543714: Rewrite each equation in intercept form. Show your steps.
Equation: y= 5+3(x-4)
- How do I do this, and what's the answer?
Click here to see answer by stanbon(75887)

Question 543714: Rewrite each equation in intercept form. Show your steps.
Equation: y= 5+3(x-4)
- How do I do this, and what's the answer?
Click here to see answer by rfer(16322)

Question 543980: I have to do this with the substitution method: Help me please
3x = 4y
x = (2y+1)/3

I know the answer is x=2/3 and y = 1/2 but I don't know the method
Thank you
Click here to see answer by umnikmo(75)

Question 543968: I'm extremely confused on how to solve a couple of these problems,
ex:2x-7y=3
5x-4y=-6
using the elimination method, could you explain a simple way of how to solve? I'm just extremely lost and any help would be greatly appreciated.
thank you, Lexy.
Click here to see answer by ankor@dixie-net.com(22740)

Question 544364: need help graphing y=5x-2
Click here to see answer by jim_thompson5910(35256)

Question 544461: okay so it says solve linear system using substitution
4x + 3y = -5
x = y - 3
Click here to see answer by stanbon(75887)

Question 544611: 4x+4=6x so what is x?
Click here to see answer by friesr(113)

Question 544768: Solve the system of
equations by graphing
x+y=8
x-y=6
where do I start?
Click here to see answer by lwsshak3(11628)

Question 545085: Use substitution to solve the system
y=2x-11
3x+2y=13
Click here to see answer by saifoo.khan(162)

Question 545088: Use substitution to solve the system
8x-9y=-1
-6x+5y=-1
Click here to see answer by saifoo.khan(162)

Question 545158: Solve by substitution method.
-10x+8y=-6
y=5/4x
I need help refreshing for final.
Click here to see answer by jim_thompson5910(35256)

Question 545358: x-3y=2
3x-4y=-4
Cant solve this using substitution method.
any help would be appreciated
thanks
Click here to see answer by jim_thompson5910(35256)

Question 545545: Please help me solve this equation.
52=4(8+5n)

Thank You.
Click here to see answer by jim_thompson5910(35256)

Question 545650: 2x-y = -4 -3x+y=-9
Click here to see answer by saifoo.khan(162)

Question 545652: which graph best represents y=1/2x+2
Click here to see answer by mananth(16946)

Question 545670: which graph best represents the equation of a line with a slope of -4 and a y-intercept of 3?
Click here to see answer by saifoo.khan(162)

Question 545681: Which equation best decribes a line parallel to the graph of y=3/2x-3?
Click here to see answer by Alan3354(69443)

Question 545683: how do you solve
x+y=-10
x=y+6
Click here to see answer by saifoo.khan(162)

Question 545683: how do you solve
x+y=-10
x=y+6
Click here to see answer by stanbon(75887)

Question 545683: how do you solve
x+y=-10
x=y+6
Click here to see answer by MathTherapy(10552)

Question 545686: what is the solution of 2(x-3)=3x-11
Click here to see answer by jim_thompson5910(35256)

Question 545833:

Click here to see answer by stanbon(75887)

Question 545835:
Click here to see answer by mananth(16946)

Question 545868: Find the equation of the line which is perpendicular to 3x-7y=-4 and passes through the point (-6,1)
Click here to see answer by mananth(16946)

Question 545951: I have been trying to figure out two problems dealing with a system of three linear equations and I keep getting confused with the steps. I used the elimination and addition method but I'm stuck.

Problem 1 is: Problem 2 is: 2x+y-z=10 3x+4y+z=14 6x+5y-2z=23 2y+7z=25 3x-y+z=5 -2y+3z=5

Click here to see answer by Edwin McCravy(20056)

Question 546290: 2x+y=3
Click here to see answer by user_dude2008(1862)

Question 546400: solve the system of equations by using the substitution method
3x-4y=29
y=x-8
Click here to see answer by mananth(16946)

Question 546415: Trail Snax Corp. mixes raisins that cost $5.00 per kg with peanuts that cost $3.80 a kg. How many kilograms of raisins should be mixed with 10 kg of peanuts to obtain a mixture worth $4.00 per kilogram?
Click here to see answer by mananth(16946)

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