5( c - 9 ) = - 15
Opening Brackets ,
= > 5( c ) - 5( 9 ) = - 15
= > 5c - 45 = - 15
Add 45 on both sides,
= > 5c - 45 + 45 = - 15 + 45
= > 5c = 30
Divide by 5 on both sides,
= > 5c / 5 = 30 / 5
= > c = 6
Hence, 6 is the solution of the given equation.
