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

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Algebra: Expressions involving variables, substitution

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Question 7799: 6(r+2) -4=-10
Click here to see answer by arunpaul(104)

Question 7804: 4(2a-1)=-10(a-5)
Click here to see answer by arunpaul(104)

Question 7796: When the digits of a two-digit number are reversed, the new number is 9 more than the original number, and the sum of the digits of the original number is 11. What is the original number?

Click here to see answer by arunpaul(104)

Question 7795: When the digits of a two-digit number are reversed, the new number is 9 more than the original number, and the sum of the digits of the original number is 11. What is the original number?

Click here to see answer by prince_abubu(198)

Question 7754: can you help me solve and show me how u solved the question: 6(N+2)-N=24
i have to be able to solve and show all of the agebraic steps of solving this problem
thank you
Ney Ney
Click here to see answer by prince_abubu(198)

Question 7825: How do I solve problems like this:
26 + 4(h+3)=
and
8(j-4)+17
Thanks for your help,

Click here to see answer by bonster(299)

Question 7821: how do you solve this?
-1/4(-32x=40y)
& this
3(x+4y)+(-4)(8x-y)
Click here to see answer by bonster(299)

Question 7818: 2(w-3)+5=3(w-1)
Click here to see answer by bonster(299)

Question 7802: 5-1/2(x-6)=4
Click here to see answer by bonster(299)

Question 7925: how do you do 4x-6=x+9
Click here to see answer by CharStar(110)

Question 7970: Can you help me I have a bunch of these and I am not sure how to solve for them? I am studing for a final and can't remember how to do these. 5d-3=-18 , 3-4c=-13, 2x+1=-4+7x, -4-5x=2x+10, 2x+2(r+1)=30, 9m-4(m-3)=27
Click here to see answer by ichudov(404)

Question 8007: Directions: Define the variables and write an equation to model the relationship in each table.
(This is one table with 2 coulumns)
Number of sales Total earnings
5 $2.00
10 $4.00
15 $6.00
20 $8.00
Can you help me with this?
Click here to see answer by Earlsdon(4898)

Question 8018: the sum of 13 and twice a number

Click here to see answer by CharStar(110)

Question 8019: the sum of 13 and twice a number
Click here to see answer by glabow(165)

Question 8017: I am trying to help my daughter with an algebra review sheet and I can not figure out how to do this problem.
a/2 + C = 19
a/4 - 3C = -8
Find a
thank you very much,
Lydia Waller
Click here to see answer by glabow(165)

Question 7989: Dick rutan and deana yeager flew nonstop around the world, a distance of 24,986.73 miles, in 216.06 hours. what is the average speed? i dont understand how im supposed to get the answer.
Click here to see answer by CharStar(110)

Question 8081: a number decreased by 5?
Click here to see answer by CharStar(110)

Question 8098: the sum of a number and 7

Click here to see answer by CharStar(110)

Question 8116: simplify the following expressionn m + 4 + 8m

Click here to see answer by CharStar(110)

Question 8129: (b+22) +3= b+ (22+3)
Click here to see answer by glabow(165)

Question 8091: what is the numerical expression to represent this phase 9less than 24 plus 23.5?
Click here to see answer by CharStar(110)

Question 8113: Please help me solve this equation.
Bobby has one and a half times as much money as Richard. Together they have $225. How much money does each have?
Choices for Richard's amount:80,90,95
Click here to see answer by prince_abubu(198)

Question 8084: Yesterday in class I was told if you had a problem like figureA you put a one in front of the variable, in this case x. Today I had a test and I did just that. After the test he went over the answers, and now he says do it as in figureB. Which way is correct? I have another test tomorrow and don't want to make the same mistakes. Thanks for your time.
FigureA: 4+x=4+1x
FigureB: 4+x=4x
Sincerely,
Katie
Click here to see answer by prince_abubu(198)

Question 8160: x+16=5x+10
Click here to see answer by bonster(299)

Question 8219: x^2+3x-4= (x+4),(x-1)
x = -4 or +1
Click here to see answer by DSquared(2)

Question 8233: Is this the correct way to solve this type of expression:
11x-8x-8=10
(11x-8x)-8=10
3x-8=10
10+8=3x
18=3x
x=6
Click here to see answer by glabow(165)

Question 8217: what is the answer to this??? 5(9+3)-3(4)
Click here to see answer by glabow(165)

Question 8248: 8d+6=-2d
Click here to see answer by bonster(299)

Question 8247: 8d+6=-2d 8d-2d + 6 6d+6= 12
Click here to see answer by miss_tader(1)

Question 8317: How do I solve this problem?
36-8/2
Click here to see answer by bonster(299)

Question 8260: 5(x-11)=8x+11
Click here to see answer by bonster(299)

Question 8265: 6x-(12-x)=-26
Click here to see answer by bonster(299)

Question 8258: -3(b-8)-5=9(b+2)+1
Click here to see answer by bonster(299)

Question 8254: -3(b-8)-5=9(b+2)+1
Click here to see answer by bonster(299)

Question 8251: 9x-(3x-1)=2
Click here to see answer by bonster(299)

Question 8224: can i get a live tutor that's online now to help me with these problems involving expressions,variables,etc.
Click here to see answer by bonster(299)

Question 8224: can i get a live tutor that's online now to help me with these problems involving expressions,variables,etc.
Click here to see answer by prabhjyot(164)

Question 8206: 49 increased by twice a number

Click here to see answer by bonster(299)

Question 8115: 2\3.x when x =1/3
Click here to see answer by bonster(299)

Question 7985: Simplify (5c-7)(-3)
Click here to see answer by bonster(299)

Question 7790: 25a+50
Click here to see answer by bonster(299)

Question 8330: can you please really help me with this question.. it will really help me alot..
solve by any method.
-2x+10=0
2x-2y=6
Click here to see answer by gsmani_iyer(161)

Question 8308: I am having a difficult time with these problems any help would be appreciated.
I think I am trying to make this harder than what it is. That is usually what I do. Could you Please show how you got the answer. Thank You!
here are the instructions:
Solve Each Equation x/2 + x/5 + x/3 = 31
Solve each formula for the indicated variable. R(r1 + r2) = r1r2, for R
Solve for x. State any restrictions on the variables. b(5px-3c) = a(qx-4)
3ax/5 - 4c= ax/5
Click here to see answer by Earlsdon(4898)

Question 8255: Whats a independent and dependent variable
Click here to see answer by Earlsdon(4898)

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