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

Tutors Answer Your Questions about Linear-systems (FREE)

Question 591826: linear equation below, rewrite into y=mX+b: x-4y=8
Click here to see answer by jim_thompson5910(28476)

Question 591886: Solve the system by any method (substitution or elimination)
1/3x + 1/3y = -3
1/2x - 1/2y = -5/2
I started doing the common denominator and got lost. The problems are super easy to me, but when they have fractions in them they throw me off and I get confused
Thank you for the help
Click here to see answer by scott8148(6628)

Question 591902: please help me solve: A dam is built on a river to create a reservoir. the water level w in the reservoir is given by the equation w=3.5t + 24 where t is the number of years since the dam was constructed and w is measured in feet . what do the slope and the y-intercept of this graph represent?

Click here to see answer by solver91311(16868)

Question 591879: Solve using substitution
y=3x+8
3y-x=7
I found the value of x, but I get stuck when trying to find y
y=3(-17/8)+8
Please help I know the answer x=13/8 but I want to know how to get the answer!!!
Thank you
Click here to see answer by ankor@dixie-net.com(15628)

Question 592060: Can someone please help me with this sum its hard and i have tried to attempt it a few times this question is really tricky! part of the question is in fraction for .this is a simulatenous linear equations
2x+3y=-30
y=2/3x-6
My answer:
2x+3(2/3x-6)=-30
Click here to see answer by mananth(12270)

Question 592057: Please, solve this system using elimination.
3x + 5y = -18
4x - 10y = -21

Click here to see answer by mananth(12270)

Question 592058: Hello i have been trying a few ways to try and do this sum but i dont seem to get it right.I tried it 4 different ways and im not getting a sensible answer.
this is what i did for solving linear quadratic equations but stopped because it doesnot look like im doing it right:
x^2=2y+10
3x-y=9
Solve eq 2 for y
3x-y=9
-y=9-3x
subs -y=9-3x
x^2+3x=2-9
x^2+3x=-7

Click here to see answer by John10(245)

Question 592177: Solve the system algebraically
5x + 2y = 10
3x + 2y = 6
Click here to see answer by Alan3354(30968)

Question 592197: he tratado de resolver la ecuacion
10/20x+ 5/20x+4/20x+3=x
pero obtengo un resultado
Click here to see answer by solver91311(16868)

Question 592308: Rewrite linear equation into y=mX+b
-3x-5y=10
Click here to see answer by solver91311(16868)

Question 592315: Rewrite linear equation into y=mx+b
2x+3y=6
Click here to see answer by edjones(7569)

Question 592398: Can someone help me with this equation I am having some difficulty and tried multiple ways .This is a Linear equation with quadratics.
x^2+3=y
y=5-x
Click here to see answer by scott8148(6628)

Question 592500: x^2+3=y
y=5-x
Can someone help me with this i keep getting a negative number !This is substituting Linear quadratic equations.Thanks so much !
Click here to see answer by mananth(12270)

Question 592496: How do you solve y=2x-6
Y=x

Click here to see answer by Alan3354(30968)

Question 592766: Solve using the substitution method. Show your work. If the system has no solution or an infinite number of solutions, state this.
-8x – 4y = -68
x + 3y = 16

Click here to see answer by unlockmath(1599)

Question 592781: 3x+75 + x + y = 180
the x and the y are supposed to help me find the area of a square.
2x + 15 and y are the sides of the square.
Click here to see answer by scott8148(6628)

Question 592785: can you please help me solve this equation: this is the question and i will show my work and where i got stuck
6x+y=-4
-6x -6x
-----------
y=-6x-4
thats where i got stuck because i dont know what to do afterwards

Click here to see answer by Alan3354(30968)

Question 592940: I have been trying to find the answer to this equation for hours. It is a substitution method equation. Here it is, y=2x-3 x-y=-4. Please help! I have gotten multiple answers like x=1 and y=5 but my teacher says that isn't right and i also got x=4 and y=8 but that also isn't right. Please can you help me?
Click here to see answer by ankor@dixie-net.com(15628)

Question 593079: how can you describe using the slope when two lines are parallel?
Click here to see answer by nerdybill(6948)

Question 593141: How do you solve the linear in equality 4x-9-8x >=-7x-11+5x?
Click here to see answer by richwmiller(9135)

Question 593805: Can someone help me with this .also i need clarification when doing Elimination. how do i know when to add and subtract can i have 2 examples of showing when to add also and can someone help me with these 2 equations.I am trying to practice for exams.
4(2x-y=-2
2(4x+y=24

8x-12y=-2
- 8x+2y=48
- __________
- -10y +-50
- Y=-50/-10
- Y-5
4x+y=24
4x+5=24
4x=24-5
4x=19
.....this isn’t looking right so far
Also
Y=x+3
Y=x^2

Click here to see answer by Alan3354(30968)

Question 593819: 2x-3y=-2
4x+y=24
This is elimination method im practicing for exam .When do we add and subtract when dealing with the elimnation method?They say when its the same you subtract and when it is different you add can someone give me and example of what this means i dont understand..
Click here to see answer by scott8148(6628)

Question 593837: y=x+3
Y=X^2
sOLVE FOR ME PLEASE
Click here to see answer by Alan3354(30968)

Question 593843: Solve the following inequality. Then place the correct number in the box provided.
2x + 1 < 5
Click here to see answer by rfer(12646)

Question 594108: x-4/8 - x+6/16=2
I got x=15 as my answer is it correct
Click here to see answer by jim_thompson5910(28476)

Question 594111: How do you solve for x and y in this problem. 5x + 2y = 63 and 3x + 2y = 51
Click here to see answer by Alan3354(30968)

Question 594122: 2x-1/18=1-6
My LCD is 18
i got a fraction
(18)2x-1/(18)=1/6
2x-1=3
2x=3+2
2x=5
x=5/2
Click here to see answer by jim_thompson5910(28476)

Question 594235: Solve this system of equations using substitution. Put your answer in ordered pair for, (x, y). x + 2y = 7 2x + y = 8
Click here to see answer by mananth(12270)

Question 594354: how do I solve than graph?Is there a graph calculator I can plug into?
y=1/2x+5
y=6x-6
Click here to see answer by Alan3354(30968)

Question 594622: Solve by substitution method.. Can you help me please?
2x+7y=6
x=10-7y
Click here to see answer by rfer(12646)

Question 594723: Substitute the known information from the problem into the perimeter formula . Simplify where necessary. Then, solve the equation for the unknown variable. Be sure to show all the steps.
Click here to see answer by richwmiller(9135)

Question 594863: Find the solution of the given system by the method of addition that was used in Examples 4 and 5. If there is no solution or infinitely many solutions, state so. Put the value for x in the blank.
2x - 3y = 1; x + 2y = 4
Click here to see answer by Alan3354(30968)

Question 595229: x+2y=9 -x-3y=-12
Click here to see answer by jim_thompson5910(28476)

Question 595372: when three numbers are added in pairs,the sums of the pairs are,22,39,and 45. What are the three numbers?
Click here to see answer by ankor@dixie-net.com(15628)

Question 595397: Did i write this quadratic correctly ?Here is the question----->5+2x^2=8x
2x^2-8x+5
Click here to see answer by jim_thompson5910(28476)

Question 595421: Factoring Quadratic formulas- Is this correct thus far?
5+2x^2=8x
2x^2-8x+5=0
a=2 b=-8 c=5
ac=2(5)=10 b=-8
Then i should find factors that multiply to give 10 & add to give -8 right ?
i only came up with the factors -5x(times)-2
Click here to see answer by Alan3354(30968)

Question 595463: 9x+8y=-37
x=-2-3y
solve by substitution method
Click here to see answer by shellyhotgirl(2)

Question 595487: How do I figure out this problem?
x-5y=2
2x-9y=5
Click here to see answer by rfer(12646)

Question 595485: Solve this system of linear equations:

Click here to see answer by math-vortex(472)

Question 595695: Solve the equations by substitution. If the equations are inconsistent and the solution is an empty set, write "no solution".
3x - y = 2
y = x - 1
Click here to see answer by jsmallt9(3296)

Question 595710: Solve the equations by substitution. If the equations are inconsistent and the solution is an empty set, write "no solution".
10x - 10y = 1
x = y - 3
Click here to see answer by Alan3354(30968)

Question 595754: How do I solve and check the following solving by substitution.
7x + 5y = -24
x = 28 - 7y
Click here to see answer by Alan3354(30968)

Question 595799: Write an equation that would be solved by using multiplication. Then, show how to solve the equation.
Click here to see answer by stanbon(57224)

Question 595799: Write an equation that would be solved by using multiplication. Then, show how to solve the equation.
Click here to see answer by jerryguo41(162)

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