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

Tutors Answer Your Questions about Linear-systems (FREE)

Question 629747: can you help me solve 5y+7=4y-5 using the addition property??
Click here to see answer by lenny460(770)

Question 629858: 3x-2y=6
-6x+4y=-6
Click here to see answer by reviewermath(522)

Question 629921: -1=5+x Over 6 i dont even know where to start
-1=5+x/6

Click here to see answer by ewatrrr(10682)

Question 630090: If the square of a number increased by the number is 42, then what is the number?
I have x^2+x=42, but I do not know if this is correct and if so, what to do after that
Click here to see answer by Alan3354(30993)

Question 630951: d=76 feet, t=19 seconds
r= ?
Click here to see answer by Alan3354(30993)

Question 630940: Solve using the elimination method. Show your work. If the system has no solution or an infinite number of solutions, state this.
4x – 8y = 48
11x + 3y = -105.5
Click here to see answer by richwmiller(9135)

Question 630979: Which of the following ordered pairs lies on the graph of h(x) = -2x2?
(1, -4)
(1, -2)
(1, 4)
Click here to see answer by Tatiana_Stebko(1326)

Question 631186: solve and check
-3(4x-4)-12=-3(7x+6)-4
Click here to see answer by jim_thompson5910(28595)

Question 631187: Solve the system of linear equations by graphing
4x+y = 0
3x + y = 2
Please explain how you determine the points to plot on the graph
Click here to see answer by Alan3354(30993)

Question 631199: which of the following is not a solution to the system of linear eqautions below? 5y=3x+15 6x=10y-30

Click here to see answer by jim_thompson5910(28595)

Question 631424: The directions for my homework are...

Solve simultaneously for x and y.

the equation is..
2x+5y=28
x-2y=2
whats y and x?
Click here to see answer by ewatrrr(10682)

Question 631458: Solve the system of linear equations and check any solution algebraically. (If there is no solution, enter NO SOLUTION. If the system is dependent, set z = a and solve for x and y in terms of a.)
2x + 2z = 2
5x + 3y = 3
3y − 4z = 2
Click here to see answer by ewatrrr(10682)

Question 631566: Use the method of substitution to solve the system of linear equations.
2x-y=4
9x-4y=21
The solution is ______.
Please show work!
Thank you
This what I have tried thus far:
2x-y=4
y=2x-4
9x-4y=21
9x-4(2x-4)=21

Click here to see answer by richwmiller(9135)

Question 631779: Gerry is twice Julia's age.Ten years ago,the square of Julia's age was 14 more than Gerry's age.What is the present age of Gerry?
Click here to see answer by stanbon(57347)

Question 631837: The first step to solving the equation 3 (x + 7) = 12x – 51 is to
combine like terms.
add the opposite to both sides.
distribute.
none of the above.
The second step to solving the equation 2x – 7 – (x – 5) = 0 is to
combine like terms.
add the opposite to both sides.
distribute.
divide both sides.
Click here to see answer by ewatrrr(10682)

Question 631895: Solve the system of equations by the Gaussian elimination method. (If the system is dependent, enter a general solution in terms of c1, c2, ... . If there is no solution, enter NO SOLUTION.)

3x − 5y + 2z = 2
x − 3y + 2z = 2
5x − 11y + 6z = 6
(x,y,z) =?
Click here to see answer by ewatrrr(10682)

Question 631881: Find equation in slope-intercept form
Question: through (-8,1), with undefined slope

Click here to see answer by Alan3354(30993)

Question 631875: Solve the system of equations. (If the system is dependent, choose any real number c for z.)

3x + y + 2z = 5
4x − 2y + z = −10
11x − 3y + 4z = −15
(x,y,z) = ?
Click here to see answer by ewatrrr(10682)

Question 631901: 2(x-5)=-11
Click here to see answer by Tatiana_Stebko(1326)

Question 631898: 4(2X+3)^2-(2X+3)=0 BY FACTORING
Click here to see answer by Tatiana_Stebko(1326)

Question 631926: how do you solve this with fractions
Click here to see answer by lenny460(770)

Question 631922: solve for substition x=-1+y
23x-7y=-7
find the solution of this system of equations. find what x= and what y=
Click here to see answer by Maths68(1474)

Question 632161: I cannot figure out how to solve systems by graphing. I have read and read but am so confused. I need to solve the system 2x+y=2; 6x+4y=12.
Please help me figure out the answer and show/explain how. Thanks.
Click here to see answer by josmiceli(9678)

Question 632158: Solve the system of equations by the Gaussian elimination method. (If the system is dependent, enter a general solution in terms of c1, c2, ...
3x − 5y + 2z = 2
x − 3y + 2z = 2
5x − 11y + 6z = 6
Click here to see answer by ewatrrr(10682)

Question 632251: i need help on elimination method
please help me to solve this equation
5x-2y=3
2x+5y=4
Click here to see answer by mananth(12270)

Question 632442: I need help graphing the equation x/9 - y/2 = 1
Click here to see answer by richwmiller(9135)

Question 632474: Solve the system of equations and give the value of x.
5x + 2y = 18
2x + 2y = 30
Click here to see answer by Alan3354(30993)

Question 632608: Use the elimination method to solve the system of equations
a+8b=3
a+2b=-3
Click here to see answer by art123(8)

Question 632977:
Click here to see answer by lenny460(770)

Question 633053: A tugboat goes 120 miles upstream in 10 hours. The return trip downstream takes 5 hours. Find the speed of the tugboat without current and the speed of the current.
Click here to see answer by mananth(12270)

Question 632979: 4x-y=5
9x-2y=13
Click here to see answer by lenny460(770)

Question 633290: Find the value of a and b so that the solution set is (10,11)
a =
b =
Click here to see answer by Edwin McCravy(8909)

Question 633345: If you were to use the substitution method to solve the following system, choose the new system of equations that would result if x was isolated in the second equation.
3x + y + 2z = 1
x + 2y – z = –8
3x – y – 3z = 18
Click here to see answer by Maths68(1474)

Question 633414: Find the unknown:
x + y - 2z = 7
2x - 3y + 2z = 0
x - 2y - 3z = 3
Click here to see answer by ewatrrr(10682)

Question 633486: How do I find the third point on a line when doiing intercepts ?
My problem is
2x-8= -4y and the question asked find the intercepts and plott them.
Click here to see answer by rfer(12660)

Question 633525: Solve the equation by addition:
9x + 4y = 104
x - 5y = 17
x =
y =
Click here to see answer by ewatrrr(10682)

Question 633527: Solve the equation by graphing:
y = x - 2
x + y = 2
x = and y =
Click here to see answer by ewatrrr(10682)

Question 633524: Solve the following equations: (Use any method)
y - 10.7x = -920
6.9x + y = -216
Select one:
(40, -492)
(40, -487)
(45, -487)
(35, -497)
Click here to see answer by ewatrrr(10682)

Question 633523: What type of equations are these:
8y = 7x
-2x = 6y
Select one:
independent
inconsistent
none of the above
dependent
Click here to see answer by ewatrrr(10682)

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