Answer:
x = 15
Explanation:
the 2 figures are similar , by the AA postulate , then
the ratios of corresponding sides are in proportion
That is the sides x + 1 and 24 , 12 and 18 , so
=
( cross - multiply )
18(x + 1 ) = 24 × 12 = 288 ( divide both sides by 18 )
x + 1 = 16 ( subtract 1 from both sides )
x = 15