Answer:
? = 5
Step-by-step explanation:
Since the figures are similar then the ratios of corresponding sides are equal, that is
= ( cross- multiply )
21x = 105 ( divide both sides by 21 )
x = 5
That is ? = 5
rational numbers and integers
-t = 9(t-10)
-t = 9t - 90
90 = 9t + t
90 = 10t
90 ÷ 10 = t
9 = t
