Formula of the area of triangle
A=(1/2)a*b*sin(C)
a, b - sides
C- an angle between sides a and b.
Probably, this question means that you need to know sin of the angle.
0.476 is the answer to this question.
Solve for x by simplifying both sides of the equation, then isolating the variable.
Exact Form would be or look like
x=9/5, -3/5