Questions on Algebra: Expressions involving variables, substitution answered by real tutors!

Tutors Answer Your Questions about Expressions-with-variables (FREE)

Question 358685: Simplify the variable expression. What is (5)(-x)?
Click here to see answer by nyc_function(2733)

Question 358889: please help me to solve this equation step by step.
c=3/4 y+b for y
Click here to see answer by neatmath(300)

Question 358778: y=-x
Click here to see answer by Fombitz(13828)

Question 359240: Please help me solve these two evaluate problems: 1. 3(n2+5); if n=3
2. 20 over/n ;if n=4

Click here to see answer by ewatrrr(10682)

Question 359262: solve m/n=p-6 for n i need help solving this problem can you help?

Click here to see answer by rfer(12646)

Question 359296: I have a problem, Please help. -12n - 19 =77 ans. -8 is that correct?
Click here to see answer by checkley77(12569)

Question 359406: 9n-2=7n+50
Click here to see answer by robertb(4012)

Question 359433: Write an algebraic expression to answer the question below.
How many months are there in years?
Click here to see answer by mananth(12270)

Question 359489: 7.4 is 50% of what number?
p.s turn into an equation leaving x the unknown factor.
Click here to see answer by neatmath(300)

Question 359518: 5x + 14 - 2x = 9 - (4x + 2)
Click here to see answer by mananth(12270)

Question 359519: 14.2y-12.5=6.4y-13.7
Click here to see answer by mananth(12270)

Question 359522: solve for t: 5t + 4 = 3s
Click here to see answer by user_dude2008(1861)

Question 359521: 3x/7 + 5x = 15
Click here to see answer by mananth(12270)

Question 359520: 3y+2/4 =7
Click here to see answer by Fombitz(13828)

Question 359621: For problems 7 through 9, solve the system of equations using ADDITION to eliminate one variable. If the system has no solution, indicate that is is inconsistent. If it has infinite solutions, indicate that it is dependent. If the system has a solution, CHECK YOUR ANSWER.
8.
x+y=3
2y=10-2x
CHECK (if possible)
Pleeeaase help me!! I am so stuck I don't know what to do!! Thank you! :)
Click here to see answer by Jk22(389)

Question 359622: For problems 7 through 9, solve the system of equations using ADDITION to eliminate one variable. If the system has no solution, indicate that is is inconsistent. If it has infinite solutions, indicate that it is dependent. If the system has a solution, CHECK YOUR ANSWER.
9.
3x-2y=14
3x+5y= -14
CHECK (if possible)
Pleeeaase help me!! I am so stuck I don't know what to do!! Thank you! :)
Click here to see answer by Alan3354(30975)

Question 359618: For problems 7 and 9, solve the system of equations using ADDITION to eliminate one variable. If the system has no solution, indicate that is is inconsistent. If it has infinite solutions, indicate that it is dependent. If the system has a solution, CHECK YOUR ANSWER.
7. 4x-3y=17
5x+y=7
CHECK (if possible)
Please help me!! I am so stuck I don't know what to do!! Thank you! :)
Click here to see answer by mathtutor19(8)

Question 359704: How do you solve:
8-2y=3y-2
thanks(:
(can you include the steps to please?)
Click here to see answer by mathtutor19(8)

Question 359617: For problems 5 and 6, solve the system of equations using SUBSTITUTION to eliminate one variable. If the system has no solution, indicate that is is inconsistent. If it has infinite solutions, indicate that it is dependent. If the system has a solution, CHECK YOUR ANSWER.
5.
y=2x
3x+y=20
CHECK (if possible)

6. 4x+2y=6
2x+y=3
CHECK (if possible)
I would really really appreciate help with this one because I don't really know what to do. Can someone help me, please?? Thanks so much!! :)
Click here to see answer by ankor@dixie-net.com(15628)

Question 359909: 6+x/4=-1

Click here to see answer by mananth(12270)

Question 360084: How would you solve: -4c - 11 = 4c + 21
Click here to see answer by Jk22(389)

Question 360126: Write an equation in point-slope form for the line parallel to -18x + 2y = 7 that contains (3, 1)
Click here to see answer by Fombitz(13828)

Question 360537: 13. Write three consecutive odd integers starting with the odd integer "i".
14. Write the two consecutive integers preceding integer "c".
15. Find five consecutive integers if the sum of the first and third is -28.
Click here to see answer by JBarnum(2044)

Question 360519: 0.03(2m-3)+0.05=5
m=??
Click here to see answer by edjones(7569)

Question 360524: Perform the indicated operations. Reduce all answers to lowest terms.
(17a^2b^3)/(18yx) divided by (34a^2)/(9xy)
Click here to see answer by checkley77(12569)

Question 360523: 0.03(2m-3)+0.05=5
m=?
Click here to see answer by checkley77(12569)

Question 360418: Perform the indicated operations and simplify the following expression: 6r^2-7r-3/r^2-1 / 4r^2-12r+9/r^2-1 x 2r^2-r-3/3r^2-2r-1
Click here to see answer by mananth(12270)

Question 360416: Perform the indicated operations and simplify the following expressions: 2z-1/z^2+z-6 - 3z-5/z^2-2z-15 + 2z-3/z^2-7z+10
Click here to see answer by mananth(12270)

Question 360785: One race car travels at 200 miles per hour and has a 30 minute head start. The second race car travels at 763 milers per hour. At what distance with the faster car catch the slower car?
Click here to see answer by ankor@dixie-net.com(15628)

Question 360831: Solve each system by the substitution method. x+3y=2, -x+y=1
Click here to see answer by ewatrrr(10682)

Question 360831: Solve each system by the substitution method. x+3y=2, -x+y=1
Click here to see answer by Jstrasner(106)

Question 360828: Solve each system by the substitution method. x+3y=2 and -x+y=1
Click here to see answer by ewatrrr(10682)

Question 360918: Jane's cell phonr plan is $40 per month plus $.15 per minute for each minute pver 200 mintues of call time. If Jane's cell phone bill is $58.00, for how many extra calling minutes was billed?
Click here to see answer by rfer(12646)

Question 360980: P = W(R-r)/2R
solve for W
solve for r
Click here to see answer by Fombitz(13828)

Question 361011: An angle is 28 degrees greater in measure than its supplement. What is the degree measure of its supplement?
Click here to see answer by Fombitz(13828)

Question 360993: c = 0.7854DL/231
Solve for D
Click here to see answer by Fombitz(13828)

Question 361014: Find the measure of an angle whose supplement and complement add to 194 degrees.
Click here to see answer by mananth(12270)

Question 361013: Find the measure of an angle whose supplement measures 6 degrees more than 4 times its complement.
Click here to see answer by mananth(12270)

Question 361051: 9s > -18
Click here to see answer by robertb(4012)

Question 361572: how do u find the third, fifth, and tenth termsof the sequence described by each rule.
A(n)=4+(n+1)(3)
Click here to see answer by rfer(12646)

Question 361611: The second angle of a triangle measures 3 times the first and the third angle measures 52 degrees more than the sum of the measures of the other two.What are the angles?

Click here to see answer by stanbon(57228)

Question 361605: y-13=-5
Click here to see answer by illyaya(3)

Question 361732: 3-r/8=-9/2
Click here to see answer by Fombitz(13828)

Question 362064: what is the difference between x-3 and 3-x?
Click here to see answer by Alan3354(30975)

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