need some more help with sis homework . . . .???

[lcw1995]

i really dont know to well but i need to find out how you solve

2/10 + n = 1??
I DONT KNOW HOW TO DO THIS ONE

n + 1/12 = 7/12
6/12? PRETTY SURE

5/8 - n = 3/8
2/8 PRETTY SURE

9/10 - n = 1/5
I DONT KNOW HOW TO DO THIS ONE

 

[booker81]

Quote:
Subtract 2/10 from both sides to get the "letter" on one side and the numbers on the other side.
2/10(- 2/10) + n = 1(- 2/10)

n = 1-2/10

Do the number math on the right side.
n = 10/10 -2/10

n = 8/10
Reduce if needed (Dunkopf might have to check me here

n=4/5

 

[lcw1995]

Quote:
Subtract 2/10 from both sides to get the "letter" on one side and the numbers on the other side.
2/10(- 2/10) + n = 1(- 2/10)

n = 1-2/10

Do the number math on the right side.
n = 10/10 -2/10

n = 8/10
Reduce if needed (Dunkopf might have to check me here

n=4/5

how about the others. clicked submit before i typed the others out. haa.

 

[booker81]

Make sure to check if you can reduce

Move the numbers over the the other side and change the fractions like you did on the previous thread. You are doing good!

 

[booker81]

Quote:

 

[Kansaseq]

Well, I'm rusty, but..............
Might be easier to change 2/10 into a decimal first. You divide 2 into 10, which gives you .2

So you have

.2 + n = 1

You have to get n by itself. To do that, you need to move .2 by subtracting it from both sides of the equation.

.2 - .2 + n = 1 - .2

n=.8

Now, to change it back to a fraction .8 is the same as 8 tenths, or 8/10

n= 8/10 or n=4/5

 

[lcw1995]

alright so
1. 4/5
2. 1/6?
3.1/4or 1/2? idk!
4 ???

 

[booker81]

Quote:

9/10 - n = 1/5
Subtract -9/10 from both sides to get the "letter" on one side and the numbers on the other side.
9/10(-9/10) - n = 1/5 (- 9/10)

- n = 1/5 -(9/10)

Do the number math on the right side - correct your fractions to match up (so multiply 1/5 times 2/2 to get 2/10)
- n = 2/10 -9/10

-n = - 7/10
Multiply by -1 to get rid of that pesky negative.
n = 7/10

Reduce if needed (It's not)

Now, you can check your work by taking "N" and plugging back in.

9/10 -7/10 = 1/5

2/10 = 1/5

Reduce.

1/5 = 1/5

 

[lcw1995]

Quote:

9/10 - n = 1/5
Subtract -9/10 from both sides to get the "letter" on one side and the numbers on the other side.
9/10(-9/10) - n = 1/5 (- 9/10)

- n = 1/5 -(9/10)

Do the number math on the right side - correct your fractions to match up (so multiply 1/5 times 2/2 to get 2/10)
- n = 2/10 -9/10

-n = - 7/10
Multiply by -1 to get rid of that pesky negative.
n = 7/10

Reduce if needed (It's not)

Now, you can check your work by taking "N" and plugging back in.

9/10 -7/10 = 1/5

2/10 = 1/5

Reduce.

1/5 = 1/5

1.4/5
2.1/6
3.1/4
4.1/5

 

[booker81]

Yup! Make sure you and sis understand how I got where I got to with them through the steps. If you want, can PM me. I'll be up early.

I love math, especially algebra. You might think that it's totally useless junk, until you go into many different types of jobs - and then it's EVERYTHING. Even my job now isn't specifically math based, but having a very good idea on how to algebra makes problem solving MUCH nicer.

Just remember to reduce - I always forget to - still.