3 3/5. - 4 1/2
find a common denominator
3/ 5 = 6/ 10.
1/2. = 5/10
3 6/10. - 4 5/10
- 1 1/10
4x -3y + z = -10...............(1)
2x +y + 3z = 0...............(2)
-x +2y - 5z = 17...............(3)
First we multiply 3*(2) and add it to (1)
6x +3y +9z =0..................+(1)..................> 10x + 10z = -10......(4)
Then we multiply -2*(2) and add it to (3)
-4x -2y -6z =0 ...................+(3)................> -5x -11z = 17...........(5)
Multiply 2*(5) and add it to (4)
-10x -22z = 34...................+(4).................> -12 z = 24 ..............>>> z = -2
Substitute z in (4)............> 10x +10(-2) = -10.............................>>> x = 1
Substitute x and z in (2).....> 2(1) +y + 3(-2) = 0..................>>> y = 4
Solution (x,y,z) = (1,4,-2)
This is division. Let’s set up your problem.
I prefer not using mixed numbers. Instead we’ll use 14/3 for the fraction.
So to start off:
14/3 / 7
the 7 can also be 7/1.
use the saying, “keep, change, flip.”
keep the 14/3, change the sign to multiplication, and flip the last fraction.
14/3 x 1/7
now multiply.
14/21 is your fraction. Now simplify.
You get 2/3.
Your answer is:
She should cut the ribbon 2/3 m.
