Question

Solve The Question

0.6(10n + 25) = 10+5n

Answers:
1: 15
2: -15
3: -5
4: 5

Answer 1

3rd answer is correct

Explanation:

`\sf \: 0.6(10n + 25) = 10 + 5n`

First, solve the brackets.

`\sf6n + 15 = 10 + 5n`

Then, subtract 5n by both sides.

`\sf6n - 5n + 15 = 10 \\ \sf \: n + 15 = 10`

Now, subtract 15 by both sides and make n as the subject.

`\sf \: n = 10 - 15 \\ \sf \: n = - 5`

Answer 2

option 3 , -5

Explanation:

0.6(10n +25) = 10 + 5n

==> distribute the 0.6

6n + 15 = 10 + 5n

==> subtract 5n from both sides

n + 15 = 10

==> subtract 15 from both sides

n = -5