## Algebra: A Combined Approach (4th Edition)

$g_c=\frac{b_t-y_s}{r_r}$
$b_t=$ Blue triangle $g_c=$ Green circle $r_r=$ Red rectangle $y_s=$ Yellow square $b_t-g_cr_r=y_s$ Isolating $g_c$ $b_t-y_s=g_cr_r$ $g_c=\frac{b_t-y_s}{r_r}$