Question

how to solve for d
d/4.2 = (d+30)/6

Answer 1

WELCOME TO OPENSTUDY!! :D

Answer 2

As for this question all you need to do is just cross multiply and then solve it!! :D

\[\frac{ d }{ 4.2 } = \frac{ d+30 }{ 6 }\]

\[6d = 4.2d + 126\]

Now bring the variables to one side and then solve for d here!! :D

\[d(6-4.2) = 126\]

\[d = 126/1.8 \]

Understood? :)