Step-by-step
X-3/7 = 4
take -3/4 to the other side
x = 3/7 + 4
x = 3/7 + 28/7 (<=another way to write 4)
x = 31/7
Is there a diagram with this question?
P=44+66+88/2=198/2=99
With Heron formula:
S=root 99*(99-44)(99-66)(99-88)=root 99*55*33*11=root 1976535= 1405.8929.....=1405.9
To solve for 
, we need to isolate it on one side of the equation.
Take the square root of both sides, making sure to use both positive and negative roots.
cannot be simplified, so we'll leave it as-is.
Add 
to both sides to fully isolate .
Expand the solution by making two solutions, one where is positive and one where it's negative.
