Question

If ST = x + 8, TU = 8, and SU = 3x, what is ST?

Answer 1

ST = 16

Explanation:

We'll assume STU is a straight line:

S<---x+8--------->T<-----8------->U

<---------------3x------------->

ST + TU = SU

(x+8) + 8 = 3x

x + 16 = 3x

2x = 16

x = 8

S<---8+8--------->T<-----8------->U

<---------------3*8------------->

ST = 16