ada yg bisa gk?? tolong dong bantuannya ... sebelumnya makasih

pq
[tex] \frac{4}{4+2} = \frac{pq}{9} [/tex]
6pq = 4 x 9
pq =36 : 6
pq = 6

qc
[tex] \frac{4}{4+2} = \frac{qc}{qc+3} [/tex]
4(qc+3) = 6qc
4qc + 12 = 6qc
12 = 2qc
6 = qc