a + 2d = 600
a + 6d = 700
find d and a
step by step
Answers
Answered by
1
Answer:
a=550 d=25
Step-by-step explanation:
subtract the equations
a+6d=700. eq.1
-a-2d=600. eq.2
4d=100
d=25
substitute the value in eq.2
a+2(25)=600
a =600-50
a=550
Answered by
2
Step-by-step explanation:
a+2d=600
a=600-2d -----(1)
put the value of a in
a+6d=700
600-2d+6d=700
4d=700-600
4d=100
d=100/4
d=25
NOW put the value of d in equation (1)
a=600-2d
a=600-2×25
a=600-50
a=550
hence, a=550 and d= 25
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