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

Tutors Answer Your Questions about Linear-systems (FREE)

Question 1132158: Solve the linear system:4x+7y=-9 3x=3y+18
Click here to see answer by greenestamps(13200)

Question 1132289: 2x+y-2z=10;3x+2y+2z=1; 5x+4y+3z=4
solve .
Click here to see answer by ankor@dixie-net.com(22740)

Question 1132289: 2x+y-2z=10;3x+2y+2z=1; 5x+4y+3z=4
solve .
Click here to see answer by MathTherapy(10552)

Question 1132456: A speedy River Barge bound for Mew Orleans leaves Baton Rouge,Louisiana, at 9:00 am and travels at a speed of 10 miles per hour. A rail transport freight train also bound for New Orleans leaves Baron Rouge at 1:30 pm the same barge and train will travel 100 miles to reach New Orleans. How much longer will it take for the barge to return to Baton Rouge if it must travel upstream against a current of 3 mph?
Click here to see answer by ikleyn(52788)

Question 1132567: How do you solve this system using elimination?
-2x+5y-3z=7
4x-3y+2z=4
-3x-y-4z=-7
Click here to see answer by t0hierry(194)

Question 1132567: How do you solve this system using elimination?
-2x+5y-3z=7
4x-3y+2z=4
-3x-y-4z=-7
Click here to see answer by greenestamps(13200)

Question 1132726: how do you solve the system of equations using substitution?
3y=-7x+10
3y=4x+38
Click here to see answer by MathLover1(20850)

Question 1132726: how do you solve the system of equations using substitution?
3y=-7x+10
3y=4x+38
Click here to see answer by Alan3354(69443)

Question 1132726: how do you solve the system of equations using substitution?
3y=-7x+10
3y=4x+38
Click here to see answer by ikleyn(52788)

Question 1132805: The sum of three numbers is -2. The sum of three times the first
number, twice the second number, and the third number is 9. The
difference between the second number and half the third number is 10.
Find the numbers.
What is the equation? I honestly have no clue how to get the equations but I can solve the equations with no problem.
Click here to see answer by MathLover1(20850)

Question 1132925: System of Equations with 2 Variables
You receive a $500 gift card to a clothing store. The store sells pants for $12 and sweaters for $21. You buy a total of 38 items and have to pay $10 of your own money beyond the gift card. How many pants and sweaters did you buy?
I missed a lot of math due to ill health and I have no clue where to start. Thank you for your help.
Click here to see answer by ikleyn(52788)

Question 1133218: The sum of two numbers is 52 the smaller number is 22 less than the larger number what are the numbers

Click here to see answer by ikleyn(52788)

Question 1133352: -6x+5y=1
6x4y= -10

Click here to see answer by Alan3354(69443)

Question 1133351: -6x+5y=1
6x4y= -10

Click here to see answer by Alan3354(69443)

Question 1133915: Find the equation of the line using the point-slope formula. Write the final equation using the slope-intercept form.
perpendicular to 5y = x − 4 and passes through the point (−2, 1)
Click here to see answer by MathLover1(20850)

Question 1133916: Find the equation of the line using the point-slope formula. Write the final equation using the slope-intercept form.
(x, y) = (−2, 10) and (x, y) = (3, −5) are points on the line
Click here to see answer by MathLover1(20850)

Question 1133912: Can someone please help?
Find the equation of the line using the point-slope formula. Write the final equation using the slope-intercept form. the x-intercept is 1, and (x, y) = (−2, 9) is a point on the line

Click here to see answer by MathLover1(20850)

Question 1133914: Find the equation of the line using the given information.
The slope is undefined and it passes through the point (x, y) = (5, 2).
Click here to see answer by Alan3354(69443)

Question 1133911: Find the equation of the line using the given information.
The slope equals zero and it passes through the point
(x, y) = (1, −4).
Click here to see answer by Alan3354(69443)

Question 1133913: Find the equation of the line using the point-slope formula. Write the final equation using the slope-intercept form.
(x, y) = (0, 8) is a point on the line with slope 7/8.

Click here to see answer by Alan3354(69443)

Question 1134121: 2c-6^3=c+7^4

Click here to see answer by Alan3354(69443)

Question 1134257: make x the subject
(a^(2)b)/(x^(2))+(1+(b)/(x))a = 2b +(a^(2))/(x)
Click here to see answer by greenestamps(13200)

Question 1134292: The cost of 5 boxes of envelopes and 5 boxes of the notebook paper is 29.95. Two boxes of envelopes and 6 boxes of notebook paper are 22.38. How much does 1 box of envelope cost
Click here to see answer by josgarithmetic(39618)

Question 1134398: {4x - y = -5
{4x - 6y = -20
-------------------- Subtract
Click here to see answer by Alan3354(69443)

Question 1134398: {4x - y = -5
{4x - 6y = -20
-------------------- Subtract
Click here to see answer by josgarithmetic(39618)

Question 1134397: Solve the following system by elimination
{3x + y = -26
{2x - y = -19
Click here to see answer by Alan3354(69443)

Question 1134397: Solve the following system by elimination
{3x + y = -26
{2x - y = -19
Click here to see answer by MathLover1(20850)

Question 1134396: Solve the following system by elimination.
{x + 3y = -7
{-x + 2y = -8
{3x + y = -26
{2x - y = -19
{4x - y = -5
{4x - 6y = -20
Click here to see answer by Alan3354(69443)

Question 1134703: Solve the equations using elimination and substitution
（1）2x+3y=11
4x+y=12
（2）3x+2y=24
2x-3y=42
Click here to see answer by Boreal(15235)

Question 1134703: Solve the equations using elimination and substitution
（1）2x+3y=11
4x+y=12
（2）3x+2y=24
2x-3y=42
Click here to see answer by MathLover1(20850)

Question 1134702: Solve the equations using elimination and substitution
（1）2x+3y=11
4x+y=12
（2）3x+2y=24
2x-3y=42
Click here to see answer by MathLover1(20850)

Question 1134780:

−6x − 2y − z = −17

5x + y − 6z = 19

−4x − 6y − 6z = −20

Click here to see answer by Alan3354(69443)

Question 1135147: What is the solution for the following system of equations? Use ANY method to solve.
y = -x +4
y = x - 2
Click here to see answer by MathLover1(20850)

Question 1135147: What is the solution for the following system of equations? Use ANY method to solve.
y = -x +4
y = x - 2
Click here to see answer by ikleyn(52788)

Question 1135243: Y-0.7y-5.1=1.8(y+3). Solve.

Click here to see answer by josgarithmetic(39618)

Question 1135357: A landscaping company needs 120 gallons of 13% fertilizer to fertilize the shrubs in an office park. They have in stock 20% fertilizer and 10% fertilizer. How much of each type should they mix together?
Click here to see answer by ikleyn(52788)

Question 1135403: find the slope and y-intercept of the line
-5x-3y=12
Click here to see answer by Alan3354(69443)

Question 1135502: how to formulate this constraint:
at least 3 units of a are needed to produce 2 units of b.
the answer if x1 is number of units of a and x2 is number of units of b so
2x1 ≤3x2
I need more explanation of this solution

Click here to see answer by ikleyn(52788)

Question 1135854: Can someone please help:
Consider this scenario: A town's population has been decreasing at a constant rate. In 2010 the population was 5,700. By 2013 the population had dropped 5,400. Assume this trend continues.
Predict the population in 2016.
Click here to see answer by josgarithmetic(39618)

Question 1135855: Find the area of a parallelogram bounded by the y-axis, the line
x = 7, the line f(x) = 5 + 2x, and the line parallel to f(x) passing through
(4, 12).

Click here to see answer by greenestamps(13200)

Question 1136170: What is the biggest struggle as you transition to be a parent?

Click here to see answer by Alan3354(69443)

Question 1136209: Express the function f in the form f(x)=ax+b. The linear function g has a rate of change -12 and initial value 90
Click here to see answer by josgarithmetic(39618)

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