Question

What must be subtracted from a’ - 4a + 5a - 6 to obtain a' - 2a +1? ​

Answer 1

Answer:

Step-by-step explanation:

Let the value to be find be x

a' - 4a +5a - 6 - x = a' -2a + 1

x = a' -2a +1 - a' +4a -5a +6

x =  a'-a' - 2a+4a-5a +1 +6

x = 0 - a + 7

x = -a +7