# Math Help - Change the variable

1. ## Change the variable

a = 1/3 (b+c)d

Express d in terms of a, b and c.

I would like to know how to solve it.

2. Originally Posted by delpreston

a = 1/3 (b+c)d

Express d in terms of a, b and c.

I would like to know how to solve it.

Hej,

$a=\frac{1}{3}(b+c)\cdot d$
1. Multiply by 3 to get rid of the fraction:
$3a=(b+c)\cdot d$
2. Divide by the bracketed term:
$\frac{3a}{b+c}= d$
3. and that's it!

EB