• Jul 23rd 2012, 12:43 AM
jj76544
how would you solve this.....

500x - 0.81 = 900x + 0.67

• Jul 23rd 2012, 12:46 AM
Deveno

1. add 0.81 to both sides
2. subtract 900x from both sides
3. simplify
4. divide both sides by what you are multiplying "x" by
5. at this point, the left side should be just x, and the right side the solution
• Jul 23rd 2012, 12:50 AM
jj76544
could you show me please!!!! I dont know crap!!! SMH!!!!!
• Jul 23rd 2012, 02:10 AM
Deveno
step 1:

500x - 0.81 + 0.81 = 900x + 0.67 + 0.81

step 2:

500x - 0.81 + 0.81 - 900x = 900x + 0.67 + 0.81 - 900x

step 3:

put the "x stuff" together, and the "non-x stuff" together:

500x - 900x - 0.81 + 0.81 = 900x - 900x + 0.67 + 0.81

now we can simply things:

-0.81 + 0.81 = 0, and 500x - 900x + 0 = 500x - 900x, so the left side becomes: 500x - 900x.

900x - 900x = 0, and 0 + 0.67 + 0.81 = 0.67 + 0.81, so the right side becomes: 0.67 + 0.81, so now we have:

500x - 900x = 0.67 + 0.81

by the distributive law: 500x - 900x = (500 - 900)x = -400x, and 0.67 + 0.81 = 1.48, so now we have:

-400x = 1.48

step 4: well, you don't really expect me to finish it ALL for you, do you?
• Jul 27th 2012, 10:35 AM
davidthompson873
This is the best solution..

500x - 0.81 = 900x + 0.67

500x - 900x = 0.81 + 0.67

-400x = 1.48
_____ _____
-400 -400

x = - 0.0037

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