Question

Can I get a step by step explanation Thnx

Answer 1

Explanation:

`A=(k(m+n))/(2)\\2A=k(m+n)\\(2A)/(k) =m+n\\(2A)/(k)-n=m\\2A-kn=km\\((2A-kn))/(k)=m`

Answer 2

( 2A - kn) /k = m

Explanation:

A = k/2(m+n)

Multiply each side by 2/k

2/k *A =2/k * k/2(m+n)

2A /k = m+n

Subtract n from each side

2A /k - n = m+n -n

2A /k - n = m

Getting a common denominator

2A/k - kn/k = m

( 2A - kn) /k = m