Suppose y was such a number. Then if x = y, then x-4 is less than x ir x-4<y so y does not satisfy the requirements. This applies to any y, so the only solution is minus infinity.
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a minus and a plus equal a minus number yeh dude
two hundred minus three times a number is equal to nine
A minus plus a minus is not necessarily positive. A minus multiplied by a minus is. The reason being that the minus of a minus is a positive. It's a double negative.
A negative number minus a positive number equals a minus number( E.G -5 - [+]5 = -10)A negative number minus a negative number equals a positive number ( If the number's big enough)(E.G -5 - -5 = 0 )Hope this helps :)
A bigger minus.