4th term is 70 . 7th term is 82 . find first term
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1
Answer:
58
Step-by-step explanation:
a+3d=70
a+6d=82
- - -
-3d=-12
d=4
a+3d=70
a=70-3d
a=70-3(4)
a=70-12
a=58
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