Answer:
96 yards
Step-by-step explanation:
This is basically just a huge addition problem that we can tackle (heh) in our heads.
If we gain yards, then we add.
If we lose yards, then we subtract.
If we started out at 50, the expression is
.
We can use the associative property of addition to simplify this. I'm just grouping together things that look easy to do in my head.

Hope this helped!
Answer:
x=-6
Step-by-step explanation:
*instead of doing a bunch of subtraction make it +(-#) you'll see what i mean
3(x - 3) - (6x - 3) = 4(3)
first do distributive property and figure out the easy stuff:
3x+(-9)+(-6x)+3=12
then you add 3x and 6x while also adding 9+3
-3x+(-6)=12
add +6 to both sides
-3x=18
then divide by -3
x=-6
Answer:
There are a total number of 1656 students in the school.
Step-by-step explanation:
Let's set up this word problem in mathematical terms.
We can call the number of Left Handed Students as X,
and we can call the number of Right Handed Students as Y.
Since there are 276 more right handed pupils than left handed, we have the following equation:
X + 276 = Y -Equation 1
Also, since there are 5/12 ratio of left handed students and 7/12 right handed students, we get:
Total Students = T
(5/12) T = X -Equation 2
(7/12) T = Y -Equation 3
Substituting equations 2 and 3 into equation 1 we get:

Solving for Total number of students (T) we get:
T = 1656