This is the expression written with only sinx and cosx.
<span>x+2y=11
can be written as
x = 11 - 2y
substitute x into the other equation
</span>-8(11 - 2y) + 6y=22
<span>simplify
-88 + 16y + 6y = 22
-88 + 22y = 22
+88 +88 isolate y
22y = 110
----- -----
22 22
y = 5! now add Y into the equation to find X
</span>-8x+6(5)=22
<span>-8x+30=22
- 30 -30
-8x = -8
---- ----
-8 -8
x = 1 (1,5) Is the solution
</span>
45/35=54/54-x
9/7=54/54-x
9(54-x)=378
54-x=42
x=12
Hope my answer helped u :)