Question

the length L of a spring is given by L=(3/4)F + 5 where F is applied force. What force F will produce a length of 8?

Answer 1

L=8
F - searched force


`L=(3)/(4)*F+5`

`8=(3)/(4)*F+5`

`8-5=(3)/(4)*F|*(4)/(3)`

`3*(4)/(3)=F`
F=4