Verified Answer :

1) First way:

\(-5(-3+x) = 20\)

=> \(15 - 5x = 20\)

=> \(-5x = 20 -15\)

=> \(-5x = 5\)

=> 
\(x = 5/-5\)

=> 
\(x = -1\)


2) Second way:

\(-5(-3+x)=20\)

=> 
\(-3+x = 20/-5\)

=> 
\(- 3 + x = -4\)

=> 
\(x = -4 + 3\)

=> 
\(x = -1\)


1) 20 = -5(-3+x)
20/-5 = -3 + x 
-4 = -3 + x
-4 + 3 = x
x = -1
2)20 = -5(-3 + x)
20 = 15 - 5x
20 - 15 = - 5x
5 = -5x
5/-5 = x
x = -1