Math Help Forum - View Single Post

nasb · #5 May 22nd, 2008, 03:09 PM

Quote:

Originally Posted by topsquark

These are all of the same type.
$8x - 7 =5(x + 4)$

$8x - 7 = 5 \cdot x + 5 \cdot 4$

$8x - 7 = 5x + 20$

$8x - 7 - 5x = 5x + 20 - 5x$

$3x - 7 = 20$

$3x - 7 + 7 = 20 + 7$

$3x = 27$

$\frac{3x}{3} = \frac{27}{3}$

$x = 9$

The other three use the same basic pattern of solution. Try them again, step by step, using the above solution as a model. If you are still stuck on any of them, just let us know.

-Dan

can you give answers for more please?