Answer:
x=6
Step-by-step explanation:
3x-5=2x+1
x-5=1
x=6
69, 70, 71, and 72
69 and 71 are the first and third digits. 69+71=140
we are given

we can see that
numerator is

and denominator is

We always put coefficient of numerator inside box
we can see that coefficient of numerators are 3 , -4 and 9
and in the left side , we put value of x after putting denominator =0


so, left side will be 2
so, option-D..................Answer
19. 5.50-1.25=4.25
21. y = -9