Question 365093
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Hi, 
*Note: to solve for x, we need to isolate x on one side of the equal sign
also note,for ex : (-1)*(-2) = +2  and 1*(-2) = -2 for ex
-4x = 20-(-4)
-4x = 20 + (-1)(-4)
-4x = 20 + 4
-4x = 24
dividing both sides of the equation by -4
-4x/-4 = 24/-4 
x = -6