Question 429867
Solution:Solve the equation:{{{(5x+21)/x=-38}}}, assuming that x, no zero.

{{{x(5x+21)/x=-38x}}}, multiplied both sides by x.

{{{5x+21=-38x}}}, write the equation in standard form

{{{43x=-21}}}, divide both sides by 43

{{{x=-21/43}}}

Answer:For x=-21/43 the value of f(x)=-38.

Check:{{{(5*(-21/43)+21)/(-21/43)=(-105/43+21)*(-43/21)=(105/21)-43=5-43=-38}}}

Done.