-2z - xy = z + 7
You are solving for x. Note the equal sign. What you do to one side, you do to the other. Isolate the x.
First, add 2z to both sides
-2z (+2z) - xy = z + 7 (+2z)
Simplify. Combine like terms
-xy = z + 2z + 7
-xy = 3z + 7
Completely isolate the x. Divide -y from both sides
(-xy)/-y = (3z + 7)/-y
x = (3z + 7)/-y
Simplify
z = (3z + 7)/(-y) is your answer
hope this helps
Angle O=64
Side m=7.3159882(rounded if needed)
Side n=16.68902(round if needed)
We are given
Angle M which equal 26.
Angle N equals 90 degrees
Side MN which equal 15.
We are asked to find all the missing elements of the triangle.
- Angle O can be found using triangle interior theorem so we can add 90+26+x =180 to find the value that satisfies the x value.



Angle O=64 degrees
We can find side m by doing law of sines.



which is 7.315(round if neeeded).
We can find side n using pythagorean theorem,



Side n=16.689(round if needed)
This doesn't make sense provide more info? :)
The rounded number to nearest whole number of 35.26 will be 35.
This is because we consider lower limit if the decimal is lower than 5, and consider the upper limit when the decimal is greater than 5.