Question

What is the answer for 65=2(d+1)+5d?

Answer 1

$65 = 2(d + 1) + 5d$
$65 = 2d + 2 + 5d$
$65 = 7d + 2$
$63 = 7d$
Finally divide by 7.
$d = 63 \div 7 = 9$
Hence, the answer is d = 9