Line segment TU AND UB make up the line TB So keep mind that if we add these two they will equal to the length of the line( TB) TB= TU+UB 7x= 5x-2+3x-2 7x=8x-4 (switch terms ) 4= 8x-7x x=4 ( solution of the first blank) TU= 5x-2 (just substitute x that we have found into the equation) TU = 5(4)-2 TU= 20 -2 = 18 TU =18 ( solution of the second blank !)
