Question

Find the value for x and ST if T is between S and U: TU = 5x - 3, SU = 45, ST = 7x.

Answer 1

SU = ST+ TU

45 = 7x+5x-3

Solve for x:

Combine like terms:

45 = 12x-3

Add 3 to both sides of the equation:

45+3 =12x-3+3

48 = 12x

Divide both sides by 12

48/12 =12x/12

4=x