Tolongin kak,,, 1.Nilai dari 12/17-1/34=....2.Nilai dari 12/22+1/14+1/28=...

a. ¹²/17 - ¹/34 =
¹²/17 (2/2) - ¹/34 =
²⁴/34 - ¹/34 = 24-1/34 = 23/34

b.12/22+ 1/14 +1/28=
12(14)/22(14) + 1(22)/14(22) + 1/28 =
168/308 + 22/308 = 190/308 + 1/28 =
190(28)/308(28) + 1(308)/28(308)=
5320/8624 + 308/8624 =
=5628/8624
=938/1438
=469/719

maaf kalo salah