Tolong no 26 ya pakai cara , terimakasih

[tex] \\ \frac{1}{rp1} = \frac{1}{r2} + \frac{1}{r3} \\ \frac{1}{rp1 } = \frac{1}{4} + \frac{1}{12} \\ rp1 = 3[/tex]
Rs=R1+Rp1
Rs=7+3
Rs=10
[tex] \frac{1}{rp2} = \frac{1}{rs} + \frac{1}{r4} \\ \frac{1}{rp2 } = \frac{1}{10} + \frac{1}{10} \\ rp2 = 5[/tex]
jadi hambatan pengganti adalah 5 ohm