Answer and I will give you brainiliest

MATH

0, additive identity.

Step-by-step explanation:

6 + x = 6

x = 6 - 6

x = 0

no, the equation would be invalid since they are both not equal.

step-by-step explanation:

here you got

4y-6+4y 2-9

first, you would simplify the equation on the form.

4y-6+4y 2-9

then, move all the terms that contains a y to the left and all the other terms to the right.

+4y-4y+-9-6

finally, you will simplify the left and the right side of the equation.

y=-3