Question

Add using horizontal method.

(b) 3a - 2b + C + 3 and a + 3b – 20 – 4​

Answer 1

Step-by-step explanation:

3a - 2b + c + 3 + a + 3b - 20 - 4

= 4a + b + c - 21

Answer 2

$\large\boxed{\boxed{{\sf{\left(3a-2b+c+3\right)+\left(a+3b-20-4\right)=4a+b+c-21}}}}$

Correct Question : $\rm{Add\:\left(\:3a\:-\:2b\:+\:c\:+\:3\right)\:+\left(a\:+\:3b\:-\:20\:-\:4\right)}$

Solution :

Given to Add $\rm{\left(\:3a\:-\:2b\:+\:c\:+\:3\right)}$ and $\rm{\left(a\:+\:3b\:-\:20\:-\:4\right)}$

• Remove Parenthesis

$\rm{=3a-2b+c+3+a+3b-20-4}$

• Group Like Terms

$\rm{=3a+a-2b+3b+c+3-20-4}$

$\rm{=4a-2b+3b+c+3-20-4}$

$\rm{=4a+b+c+3-20-4}$

$\rm{=4a+b+c-21}$