Question

route 2 17 - x is equal to x minus 7

Answer 1

I think the answer is 112

Answer 2

✓217-x=x-7

squaring both sides

217-x=( x-7)^2

217-x=x^2+49-14x

x^2+49-14x-217+x=0

x^2-13x-168=0

x^2-21x+8x-168=0

x(x-21)+8(x-21)=0

(x-21)(x+8)=0

x=21,-8