Question

(7.5-x)*3 2x=19.

Answer 1

-32x*7.5+32x^2+19.5=0

x^2-7.5x+39/64=0

(x-7.5/2)^2-7.5^2*16/64+39/64=0

(x-7.5)^2=261/64

x-7.5=±√261/8

x1=7.5+√261/8

x2=7.5-√261/8