Answer:
=−470
Step-by-step explanation:
−20−100−(−100)−150−300
=−120−(−100)−150−300
=−20−150−300
=−170−300
=−470
Answer:
30 and 9
Step-by-step explanation:
x+y=39 , x-y=21
Solve for x:
x+y=39 , x-y=21
x= 30
Substitute x with 30:
(30)+y=39 , (30)-y=21
Solve for y:
y=9
Answer:
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Step-by-step explanation: