Question

which expression is equivalent to 3y - 8 - 7y + 9


-3y

-10y + 1

-9y

-4y + 1

Answer 1

The second one.

Because 3y-7y = -10y and -8+9 = 1
-10y + 1

Answer 2

-10y + 1 because when you combine like terms 3y minus -7y because of the subtraction symbol in front so that equals -10y then -8 + 9 equals 1 so it’s -10y + 1