9x(30+7)=(9x30)+(9x7)
remove parenthesis :
9x(30+7) = 9x * 30 + 9x * 7
multiply : 9 * 30 = 270
9x(30+7) = 270x + 9 * 7x
multiply : 9*7 = 63
9x(30+7) = 270x +63x
add : 270x + 63x = 333x
expand : 30 + 7 = 37
multiply : 9*37 = 333x
subtract : 333x - 333x = 333x - 333x
Answer : 0
I hope this helps
