Question

There is a value of a such that subtracting a-4 from 4a+16 gives an answer of -25. What is that value of a?

Answer 1

form an equation:-

4a + 16 - (a - 4) = -25


Note we put the a - 4 in parentheses because we are subtracting all of this expression.

Answer 2

solve this for a.

Answer 3

4a+16 -a +4=25

Answer 4

yes

Answer 5

then 3a+20=25?

Answer 6

Hold on - i missed that :-
right side is -25 NOT 25

Answer 7

ohhhhhhh so 3a=20=-25 and then -20-25=-45/3 and then -15?

Answer 8

correct

Answer 9

thank ya sir!

Answer 10

its best to write it out this way - one line for each step:-

3a + 20 = -25
3a = -45
a = -45/3 = -15

Answer 11

yw