How do you do 8y + 5 - 4y +1 =46

Y=10

Step-by-step explanation:

You need to isolate the variable "y"

To do this simply subtract the whole numbers, 5 and 1, from the left side of the equation and add the y values together.

This leaves you with "8y-4y=46-5-1" which simplifies to "4y=40"

Now you simply divide both sides of the equation by the number with the variable y, being 40/4 , leaving you with "y=10"

1936

Step-by-step

use BIDMAS

(1 - 6 + 21 + ) = (1 - 6 + 21 + 3) = (1 - 30) = -29

[15 - -29] = [15 + 29] because two minuses together make a plus

= 1936