MATHS questions, please help

PLease help me!!? And I would appreciate workings out as well as people being serious about this, I've had a few people telling me to go do it myself. TRUST me, I do most of it myself, we just have so much homework its impossible to understand everything, stuff gets muddled up.
ANYWAY, thanks.

Q1. Solve for x:
a) 3-2x=3x+8
b) 3(2x-1)-2(x+7)=-5

Q2.
Translate into linear equations BUT DO NOT SOLVE:
a) When a number is decreased by 1 and the resulting number divided by 4, the answer is 15.
b) When a number is multiplied by 2 and 8 is subtracted, the result is 0.
c) Oranges cost 45 cents each and lemons cost 34 cents each. Caitlin buys 3 more oranges than lemons and the total cost is $6.43.

Q3.
a) x+2 divided by (over) 3 = -2
b) x divided by (over) 3 + 2 = -2

Q4. When a number is doubled and then decreased by 5, the result is 9. Find the Number.

I REALLY appreciate this guys, helping me heaps. THANKYOU.

Q1. Solve for x:
a) 3-2x=3x+8
-3x-2x=-3+8
3x+2x=3-8
5x= -5
x= -5/5
x= -1


b) 3(2x-1)-2(x+7)=-5
(6x-3) - (2x +14)=5
6x - 2x = 3 +14 +5
4x = 22
x = 22/4 or 11/2

Q2.
Translate into linear equations BUT DO NOT SOLVE:
a) When a number is decreased by 1 and the resulting number divided by 4, the answer is 15.

let x=number

[(x-1)/4]=15

b) When a number is multiplied by 2 and 8 is subtracted, the result is 0.

let x=number

x(2) - 8 = 0

c) Oranges cost 45 cents each and lemons cost 34 cents each. Caitlin buys 3 more oranges than lemons and the total cost is $6.43.

let x = orange
let y = lemons

3x - y = 6.43

Q3.
a) x+2 divided by (over) 3 = -2

[x+2/3]=-2
x+2(1)=3(-2) cross multiply.
x+2= -6
x= -2-6
x= -8


b) x divided by (over) 3 + 2 = -2

x/3+2=-2
x/5=-2
x(1)= (-2)(5)
x = -10

You can check by replacing the value of x with the answer.

Q4. When a number is doubled and then decreased by 5, the result is 9. Find the Number.

let x =number

2x-5=9
2x=5+9
2x=14
x=14/2
x=7


I tried the best I could to help you. Goodluck. Study hard.

http://www.wolframalpha.com/

I really suggest you do your work though. this is for desperate no time left type of situations.