How would you solve a function giving?
You could first think in terms of f(x) aslike f being the output and x being the input. If we were to solve for f(x)=3x+8 in thermes of f(8) it would be f(8)=3(8)+8=30. A herlpful video would be https://www.youtube.com/watch?v=ZFPkQkURSxk