Okay we are doing solving linear equations and I am having trouble on a few:
* 4(2n-1)=(3n+9)+8
* x/2 -2=x/5+1
*-2(t-2)+6t=8t -3
*7x+5/8=8x-1/8
Any help would be greatly appreciated.
What rules and techniques are available to you?
Have you these?
1) Distributive Proporty of Multiplicatino over Addition
2) Addition/subtraction
3) Multiplication/Division
4) Gather variables to one side and constants to the other
There may be others. Let's see what you get.
Not quite. You started with the right idea but you multiplied by 8 wrong:
$\displaystyle 7x + \frac{5}{8} = 8x - \frac{1}{8}$
$\displaystyle 8 \left ( 7x + \frac{5}{8} \right ) = 8 \left ( 8x - \frac{1}{8} \right ) $
$\displaystyle 56x + 5 = 64x - 1$
Now take it from here.
-Dan
$\displaystyle \frac{x}{2} - 2 = \frac{x}{5} + 1$
$\displaystyle 10( \frac{x}{2} - 2) = 10( \frac{x}{5} + 1)$
$\displaystyle 5x - 20 = 2x + 10$
$\displaystyle 3x = 30$
$\displaystyle x = 10$
$\displaystyle -2t + 4 + 6t = 8t - 3$Originally Posted by Matt37
$\displaystyle 7 = 4t$
$\displaystyle t = \frac{7}{4}$
Multiply with 8 straight throughOriginally Posted by Matt37
$\displaystyle 56x + 5 = 64x - 1$
$\displaystyle 6 = 8x$
$\displaystyle x = \frac{6}{8} = \frac{3}{4}$
Hope it helps