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frez [133]
3 years ago
10

Help please this is hard

Mathematics
1 answer:
poizon [28]3 years ago
7 0

Answer:

Step-by-step explanation:

3. z-(-12)=15

z+12=15

-12 on both sides

z=3

4. x-(-7)=-10

x+7=-10

-7 on both sides

x=-17

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