-12
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(-5) + (-2) = (-7)
-5 + x = -7
Add 7 to both sides: 2 + x = 0
Subtract 2 from both sides: x = -2
27
X+-7
Nope. See at "point 7"? That means it is a fraction added to 5 ones. It means 7 tenths of a one. More than 5, less than 6.
Any number can multiply 144 and be added to 7!
6