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vodomira [7]
3 years ago
9

This is so confusing

Mathematics
2 answers:
Nesterboy [21]3 years ago
8 0

Step-by-step explanation:

d-7=<u>4</u><u>d</u><u>+</u><u>3</u>

<u> </u><u> </u><u> </u><u> </u><u> </u><u> </u><u> </u><u> </u><u> </u><u> </u>e

e(d-7)=4d+3

de-7e=4d+3

ed-4d=3+7e

d(e-4)=3+7e

d=<u>3</u><u>+</u><u>7</u><u>e</u>

<u> </u><u> </u><u> </u><u> </u><u> </u><u>(</u>e-4)

hope it helps.

shutvik [7]3 years ago
4 0

Answer:

first one should be:

ed-4d

then the one in the brackets should be:

e-4

the final answer should be

e-4

the full question is the picture

Step-by-step explanation:

ed-7e=4d+3

ed-4d=3+7e

d(e-4)=3+7e

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Answer:

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Step-by-step explanation:

1 step:

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According to the 2nd step,

\sum \limits_{j=1}^k2^j=2(2^k-1)

Substitute it into the \ast

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