Question

Y=2x+3 substitute-3 for x

Answer 1

Y = 2x (-3) + 3

remove parenthesis : ( -a ) = -a

-2 * 3 + 3

multiply : 2 * 3 = 6

-6 + 3

add/subtract : -6 + 3 = -3

answer ; -3

I hoped this helped

Answer 2

Y=2(-3)+3
Y=-6+3
Y= -3