-60-(-51)

Let's evaluate: -60 -(-51)
ⓘ Subtract a negative number by adding its opposite: the two minus signs become a plus: -(-51) = 51
-60 + 51
ⓘ Start from -60 and move forward 51 on the number line, getting closer to zero: -60 + 51 = -9
▶Result:   -9

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