Solve the following expression:
?−2−(−4)=−20 \text{?}-2-(-4)=-20 ?−2−(−4)=−20
Note the following law:
−(−x)=+ -(-x)=+ −(−x)=+
Now let's write the exercise in the appropriate form:
?−2+4=−20 ?-2+4=-20 ?−2+4=−20
?−2=−20 ?-2=-20 ?−2=−20
We'll move minus 2 to the right side and maintain the appropriate sign:
?=−20−2 ?=-20-2 ?=−20−2
Now we get:
?=−22 ?=-22 ?=−22
−22 -22 −22