algebra

posted by .

can someone please tell me how to solve these, thanks!
1.2(3b-4)=8b-11
2.5(r-1)=2(r-4)-6
3.2y+3=3(y+7)
4.15x-10=-9x+2

• algebra -

1.2(3b-4)=8b-11
6b-8 = 8b-11
-2b = -3
b = 3/2

• algebra -

i don't get it :( at all

• algebra -

3. 2y+3 = 3(y+7)
2y+3 = 3y+21
-y = 18
y = -18

I have helped you on # 1 and 3, now I think you can manage doing 2 and 4.

• algebra -

for # 3, you can use the distributive property.

2y+3=3(y+7)
2y+3 = 3y+21

subtract 2y from both sides of the equation

3 = y+21

now subtract 21 from both sides

-18 =y

• algebra -

4. 15x -10 =-9x+2
15x +9x = 2+10
24x = 12
x = 1/2

• algebra -

ohhh i get it thanks!

• algebra -

I'm really glad you do, and you're welcome;)

Similar Questions

1. Algebra

Can someone tell me if I am right? Factor by group 20x^2-12x=15x-9 20x^2+3x+9 (4x+3)(5x-3) answer
2. Algebra

Can someone please tell me how to solve this problem?
3. Algebra

I don't know how to solve 12x(2)-15x=0 using the quadratic equation ax+bx+c=0 with this question I am unsure of what a, b and c are supposed to be, therefore I do not know how to solve this! Please help!
4. algebra

solve for m: F = ma someone tell me how to do this please!!!!!
5. Math

Solve for x: x^4-15X^2+14=0 How would I solve this problem?
6. math

Solve by elimination 5x+y=2 3x+y=1 This is what I got : 3(5x+y=2) -5(3x+y=1) 15x+3y=6 -15x-5y=-5 -2y=1 2 2 Y=1/2 15x+3(1/2)=6 15x+3/2 =6 15x/15= 9/2 /15 X=3/10
7. Algebra

I need help trying to put the correct vocabulary words when solving this problem such as grouping, factor, prime factor, GCF, and perfect square, and please check and see if I am doing this correctly. 15x^2+31x+2 In my last problem …
8. Algebra

I need help trying to put the correct vocabulary words when solving this problem such as grouping, factor, prime factor, GCF, and perfect square, and please check and see if I am doing this correctly. 15x^2+31x+2 In my last problem …
9. Algebra

Simplify this expression (DO NOT solve for x) 5x+6(x+2)-8(x-3) I have no clue, can someone tell me how to solve it?
10. Algebra

Divide by synthetic division (x^4-15x^2 +38x-60)/(x-3) Can someone please help with this.

More Similar Questions