Question

if 1 x is 77 and 1 y is 89 so what was x + 9y

Answer 1

1 x=77

1 y=89

so, x+9y=77 + 9 * 89

            = 801 + 77

            =878

Answer 2

1x=77
1y=89




x+9y= 1x+(1y*9)

because x= 1x =1*x any thing multiplied by 1 is the same no.

9y=9*y=9*1y
the same reason as i said for x

therefore x+ 9y= 1x+9*1y

you can substitute the values and proceed