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Old 08-28-2010, 02:56 AM   #35
Belaslav
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Originally Posted by Lirange View Post
Solve for x and list restrictions for variables.
I'm having difficulty with these problems-_-.

1) .5(2x+3/4)-1/3(.1+x)=1
x+.375-.03(forever)+-1/3=1 (Distribute)
The .0333333 is what screws me up. I think if I leave -1/3*.1 as a decimal I'll get it right but I don't know how to do thatxD. Forgot basic multiplication.
Code:
1/2(2x+3/4) - 1/3(1/10 + x) = 1 --- remove outer factors

(x + 3/8) - (1/30 + x/3) = 1 --- remove brackets

x + 3/8 - 1/30 - x/3 = 1 --- find a common denominator (240)

240x/240 + 90/240 - 8/240 -80x/240 = 1 --- "unite" the equation under one denominator

(240x + 90 - 8 - 80x)/240 = 1 --- move the denominator to the right side, and do the arithmetic calculations on the left side

160x + 82 = 240  --- wont bother explaining, this is too easy
160x = 240 - 82
160x = 158
x = 158/160
x = 79/80
There. You list the restrictions, I forgot how to do that.
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Last edited by Belaslav; 08-28-2010 at 02:59 AM..
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