Pre Algebra ??-MultiStep Equations with Fractions & Deci

Okay; you've told us the topic you're working on.... Did you have a question?

Eliz.
 
sorry. here they are:
i am confused on all of them, so here are a few examples:
x/4-3x/2=-1/2
**Combine like terms?

2/7k-1/14k=-3

i don't know where to start..
 
Start by multiplying by the GCD (greatest common denominator)
 
itchycontrolyou said:
sorry. here they are:
i am confused on all of them, so here are a few examples:
x/4-3x/2=-1/2
**Combine like terms?

2/7k-1/14k=-3

i don't know where to start..
Click to expand...

You can always multiply both sides of an equation by the same non-zero number. If you choose a multiplier that all of the denominators will divide into evenly, then you will end up with an equation that has NO fractions.

For example, the denominators for the fractions in the first equation (4, 2, and 2) will all divide evenly into 4. Multiply both sides of the equation (and that means multiplying EACH term in the equation) by 4:

4*(x/4) - 4*(3x/2) = 4*(-1/2)

Divide each denominator into the multiplier:
1*x - 2*3x = 2*(-1)
x - 6x = -2
Now, can you finish it?

For the second one, each of the denominators will divide evenly into 14. Multiply both sides of the equation by 14:

14*(2/7)k - 14*(1/14)k = 14*(-3)

Divide each denominator into the multiplier:
2*2(k) - 1*1(k) = 14*(-3)
4k - 1k = -42
You can finish this one, too.

Do you see how this works?
 
Combine like terms
0.7n-1.5+7.3n=1.45
0.7n+7.3n=1.45+1.5

You've been spoiled. We drop by when the spirit moves. No pay, just good will. Two hours wait is not unusual.
 
FeomFirstToLastxSonny said:
Ok What AboutThis One?
Click to expand...
Please post new questions as new threads, rather than "hijacking" other people's threads.

Thank you for your consideration.

Eliz.
 
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