First, open the brackets (rule No 1)
By multiplying what is outside the bracket by what is inside the bracket
( 6 × X ) + ( 6 × -8 ) = -84
This will give you
6x + -48 = -84
Always a + and a - will give you a -
6x - 48 = -84
Collect like terms by moving the -48 to the other side. This becomes +48
(Always when a number changes side, it also changes sign)
6x = -84 +48
6x = -36
Divide by 6 to stay with X only.
(When you have a product you have to divide to take what you don't want)
X = -36 ÷ 6
X = -6 (minus sign remains)
(Minus sign gets out only when you are dividing a -number by another -number)
They cancel each other