Hi everyone,

i know i am way out of my league being on this forum but i am a mature student looking to get into college & for the corse i want i ned to repeat my maths exams! I tried signing up to a class but the pace was too fast for me. Anyway any help with this simple problem would be appreciated, thanks in advance!

Find the missing number in the following calculation:

-5x3x?=30

My question is this,

what is the formula or procedure to finding out the missing number, other examples are

(7?-5)x3=-9

or

?-(-3)x(-2)=-4

thanks again and i do apoligise for asking such a stupid question on here!

Laura