Question

evaluate a+b-c+d for a = 1,b =2, c = 3,d =4​

Answer 1

Step-by-step explanation:

Given

ba=31⇒a=3b

cb=2⇒c=2b

dc=21⇒d=2c⇒d=2×2b=b

ed=3⇒e=3d⇒e=3b

fe=41⇒f=4e⇒f=34b

∴defabc=b×3b×34b3b

Answer 2

Answer:

dear mate your answer is

$1 + 2 - 3 + 4 = -4$

hope it helps you