Solving equations involving functions

12 questions

1. An equation is used to show two expressions that are __________ each other.
2. If {\text{f}}(x)=7x−4 evaluate {\text{f}}(8).
3. Solve 7x-5=-26 x=___
4. Solve 7x-5=31-3x x=___
5. Solve x^2+3x-26=7x-5.
6. Solve {4\over{3x+7}}={3\over{x-1}} x=___
7. If {\text{f}}(8)=145 then {\text{f}}(x) is a function which __________ 8 to 145.
8. If {\text{f}}(x)=5(x−11) solve {\text{f}}(x)=50 x=___.
9. If {\text{f}}(x)=x^2−8x solve {\text{f}}(x)=-12.
10. If {\text{f}}(x)=5(x−11) and {\text{g}}(x)=2x+5 solve {\text{f}}(x)={\text{g}}(x) x=___.
11. If {\text{f}}(x)={7\over{3x}} solve {\text{f}}(x)=21.
12. If {\text{f}}(x)={{5x+11}\over{2}} and {\text{g}}(x)=-{{1}\over{x}} solve {\text{f}}(x)={\text{g}}(x).

License: OGL