Tolong bantu ya dari kemaren tau rumus tapi pas ngitung ga ketemu temu hasilnya terimakasiii

[tex]P_{1} [/tex] = Rp 6   [tex]Q_{1} [/tex] = 10 kg
[tex]P_{2} [/tex] = Rp 8   [tex]Q_{2} [/tex] = 6 kg

[tex] \frac{P - P_{1} }{P_{2} - P_{1}} [/tex] = [tex] \frac{Q - Q_{1} }{Q_{2} - Q_{1}} [/tex] 
[tex] \frac{P - 6}{8-6} [/tex] = [tex] \frac{Q - 10 }{6 - 10} [/tex] 
[tex] \frac{P - 6}{2} [/tex] = [tex] \frac{Q - 10 }{-4} [/tex] 
-4(P - 6) = 2(Q - 10)
-4P + 24 = 2Q - 20
-4P + 24 + 20 = 2Q
        -4P + 44 = 2Q
                   Q = -2P + 22