I believe you haven't included the system of equations for us to solve.
However, I will tell you that you need to solve for one variable in an equation and substitute that into the other equation.
For example:
x = yz; z = x/y
a = zb; a = (x/y)b
Hope this helps!
Answer:12
Step-by-step explanation: just did the assignment
Answer:

For further explanation see the picture attached...
0.997799
sin(190)=0.997799
Answer:
all the values
Step-by-step explanation:


so all the values for x are solutions