Question

F(7)+x F=2x+5x how do i solve this?? Someone please help exam tmrw

Answer 1

49-7F

Explanation:

F(7)+xF=2x+5x

F(7)+xF=7x

F(7)=7x-xF

F(7)=x(7-F)

substitute x=7 in the equation above

Therefore, 7(7-F)

=49-7F