+0

# how do you solve (3x+9)-(5x-0)

0
424
1

how do you solve (3x+9)-(5x-0)

side note: dont want just the answer but also how'd you solved the answer...

Jun 5, 2014

#1
+3451
+8

Start by lining it up vertically.

3X + 9

-  5X - 0   (then just subtract like you usuallly would)

------------

-2X+9

You can check this by putting in a number for x, for the simplified version and the original problem to see if it works. Let's put the number 5 in.

Original problem:

(3(5)+9)-(5(5)-0) =

(15 + 9)-(25- 0) =

(24)-(25)

= -1

Simplified version:

(-2(5)+9) =

((-10) + 9)

= -1

They both equal -1, so it works!

Jun 5, 2014

#1
+3451
+8

Start by lining it up vertically.

3X + 9

-  5X - 0   (then just subtract like you usuallly would)

------------

-2X+9

You can check this by putting in a number for x, for the simplified version and the original problem to see if it works. Let's put the number 5 in.

Original problem:

(3(5)+9)-(5(5)-0) =

(15 + 9)-(25- 0) =

(24)-(25)

= -1

Simplified version:

(-2(5)+9) =

((-10) + 9)

= -1

They both equal -1, so it works!