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

Tutors Answer Your Questions about Linear-systems (FREE)

Question 254721: Trying to solve by substitution method.
4x + 7y = 36
x = 19 - 3y
Click here to see answer by drk(1908)

Question 254721: Trying to solve by substitution method.
4x + 7y = 36
x = 19 - 3y
Click here to see answer by jim_thompson5910(28595)

Question 254840: Is the relationship
linear? Tell how you decided. Write the equation for each linear relationship

Thank you in advance!
x 5 10 15 20 25 30
y 20 30 40 50 50 50
Click here to see answer by stanbon(57348)

Question 254857: Hi! I need help with this direct variation equation.
It says If y=4 when x=2, find y when x=16.
How do you solve this?
Thanks -Drea
Click here to see answer by nerdybill(6959)

Question 254857: Hi! I need help with this direct variation equation.
It says If y=4 when x=2, find y when x=16.
How do you solve this?
Thanks -Drea
Click here to see answer by richwmiller(9135)

Question 254867: Hi! I need help with this equation. The directions read determine if each equation is a direct variation. If it is, find the constant of variation. The first equation is 2y=5x+1
-Thanks -Drea
Click here to see answer by richwmiller(9135)

Question 254864: how would I write an equation for the following linear relationships:
(x5,y20),(x10,y30)(x15,y40)(x20,y50)(x25,y50)(x30,y50)
Click here to see answer by richwmiller(9135)

Question 254873: x+10=-7x-2
Click here to see answer by unlockmath(1599)

Question 254869: 6x-2y=8
-4x+6y=18
Click here to see answer by jim_thompson5910(28595)

Question 254999: 3(X+2)=2X-7
Click here to see answer by richwmiller(9135)

Question 255040: Problem:
Two long-distance runners leave the starting gate, one running 10 mph and the other 7 mph. If they maintain the pace, how long will it take for them to be one-quarter of a mile apart?
Formula for to develop the problem needed.
Click here to see answer by Greenfinch(383)

Question 255076: solve for X
5X + 3Y = 8X - 9Y
Click here to see answer by CharlesG2(828)

Question 255076: solve for X
5X + 3Y = 8X - 9Y
Click here to see answer by richwmiller(9135)

Question 255102: How would i solve this linear equation? x+3y=6 using intercepts and checkpoints?
Click here to see answer by richwmiller(9135)

Question 255118: solve the following systems of equations and state if the lines are parallel:
y+4x+5=2
y+3x=2
Click here to see answer by richwmiller(9135)

Question 255118: solve the following systems of equations and state if the lines are parallel:
y+4x+5=2
y+3x=2
Click here to see answer by Alan3354(30993)

Question 255248: A total of 416 tickets were sold for the school play. The number of student tickets sold was three times the number of adult tickets sold . How many adult tickets were sold?
Click here to see answer by palanisamy(496)

Question 255417: 7x+2y=24
8x+2y=30
Click here to see answer by jim_thompson5910(28595)

Question 255519: How Do I Solve Linear Equations Like: 2y-5x=10
Click here to see answer by richwmiller(9135)

Question 254127: Please solve for w, x, y, and z.
1. x + 3w = 4
2y - z -w = 0
3y - 2w = 1
2x - y + 4z =5
2. x + y + z + w = 6
2x + 3y - w = 0
-3x + 4y + z + 2w = 4
x + 2y -z +w = 0
Click here to see answer by CharlesG2(828)

Question 255581: is (2,2-2) a solution to the equation 3x-2y=10 ?
Click here to see answer by drk(1908)

Question 255664: what is a system equation and how do you solve?
Click here to see answer by richwmiller(9135)

Question 255484: 4x+2y=-2
3x-4y=-18
Click here to see answer by EMStelley(187)

Question 255722: how do i solve this system that has three variables?
x+5y-z=16
3x-3y+2z=12
2x+4y+z=20
Click here to see answer by jim_thompson5910(28595)

Question 255760: May i have help finding a answer here is my question.... it says to rewrite the equation in function form the question is -3x + y = 12
Click here to see answer by stanbon(57348)

Question 255819: i do not understand the graphing part.
Click here to see answer by solver91311(16885)

Question 255824: I don't understand. Can you help me?
Find the slope of a line parallel to the graph of this equation.
y=4x+2

Click here to see answer by solver91311(16885)

Question 255824: I don't understand. Can you help me?
Find the slope of a line parallel to the graph of this equation.
y=4x+2

Click here to see answer by Greenfinch(383)

Question 255829: how do i find the equation of a line through two points, (4,3) and (2,4)? Please explain, the book says the answer is y=-1/2x+5 but I don't get how they got -1/2 and 5.
Click here to see answer by Greenfinch(383)

Question 255910: 10 + 4a < -6
Click here to see answer by unlockmath(1599)

Question 255885: when does a system of linear equations has a unique solution? no Solution? and Infinitely many solutions?

Click here to see answer by checkley77(12569)

Question 256092: how do I find the slope of 2x +3y =15
Click here to see answer by stanbon(57348)

Question 256144: Alicia is the lead attorney in an insurance law department. She supervises 26 attorneys and 11 paralegals. One supervisory matter has to be created based upon the hours worked on by the attorneys and paralegals, totaling 540 hours. How many matter were used to create the one supervisory matter needed?
I can't figure out how to write out the problem here.
Click here to see answer by richwmiller(9135)

Question 256160: (10,-6) and (-2,-6)
Click here to see answer by Alan3354(30993)

Question 256255: Trying to help my child and I do not understand how to solve these problems.
Equations as follows:
y= x-1
y= -x +7

Can you please show solution with explanation so I understand where the answers (numbers) came from and how these problems are solved?
Click here to see answer by scott8148(6628)

Question 256336: The degree measures of the angles of(triangle)ABC are represented by x degrees, 2x degrees and (6x-54)degrees. Find the measure of the largest angle.
Click here to see answer by unlockmath(1599)

Question 256334: Solve for x and y.
3x + 2y = 100
4x + 3y = 135
Click here to see answer by Fombitz(13828)

Question 256461: 3x+5y=16
2x- y=2
Click here to see answer by richwmiller(9135)

Question 256461: 3x+5y=16
2x- y=2
Click here to see answer by stanbon(57348)

Question 256463: Alicia has 3 law units she supervises and has been assigned 11 additional attorneys. Each law unit has the same number of attorneys. Altogether there are 47 attorneys. HOW MANY ATTORNEYS ARE IN EACH LAW UNIT?
Click here to see answer by richwmiller(9135)

Question 256489: Solve for X, Y, and Z in the following systems of three equations using either substition or elimination methods: 10X + Y + Z = 12, 8X + 2Y +Z = 11, 20X - 10Y - 2Z = 8

Click here to see answer by Edwin McCravy(8909)

Question 255901: Directions say to use a system to solve the system of equations. Here are the two equations given.
-5x + 3y = 6 and x - y = 4
Click here to see answer by richwmiller(9135)

Question 256338: Triangle DEG has the coordinates D(-1,1), E(5,-1) and G(4,5) Triangle DEG is rotated 90degrees about the origin to form triangleD'E'G'. State the coordinates of the vertices D', E', and G'.
Click here to see answer by Edwin McCravy(8909)

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