# Math Help - Equations

1. ## Equations

Hey guys,

There are some questions that have been giving me some trouble.

SOLVE:
6x+5=7+2x

Solve:
3(2z-5)=30
(i got z=7.5 for that one)

Solve the equation

1/2(x+3)-1/5(x-4)=5

Your not allowed trail and emprovement in this one

2. Originally Posted by Xplicit
1/2(x+3)-1/5(x-4)=5
I assume you mean $\frac1{2(x+3)}-\frac1{5(x-4)}=5$

Multiply the whole equation by $10(x+3)(x-4)$

3. Originally Posted by Xplicit
Hey guys,

There are some questions that have been giving me some trouble.

SOLVE:
6x+5=7+2x
what did you get on this one? try to get all x's on one side and all constants on the other, then simplify

Solve:
3(2z-5)=30
(i got z=7.5 for that one)
correct

Solve the equation

1/2(x+3)-1/5(x-4)=5

Your not allowed trail and emprovement in this one
$\frac 12 (x + 3) - \frac 15(x - 4) = 5$ .........multiply through by 10, we get:

$5(x + 3) - 2(x - 4) = 5$

now expand and conitnue

...or did you mean to type: $\frac 1{2(x + 3)} - \frac 1{5(x - 4)} = 5$. if so, you should use the proper parentheses. let me know what the question is. in this case, multiply through by $10(x + 3)(x - 4)$

4. For the question 6x+5=7+2x I got X=0.25

The other question was the first one you posted Where you times by 10 and i got X=6 for it. not to sure if thats right tho