yang tahu tolong bantu pakai caranya nomor 3 dan 4 makasiiiih

3) 2x/3 + 4 = 1/7
2x/3 = 1/7 - 4
2x/3 = 1/7 - 28/7
2x/3 = -27/7
x = -27/7 × 3/2
x = -81/14
x = -5(11/14)
atau
2x/3 + 4 = -1/7
2x/3 = -1/7 - 4
2x/3 = -1/7 - 28/7
2x/3 = -29/7
x = -29/7 × 3/2
x = -87/14
x = -6(3/14)

4) 5 / (x - 1) = 1/2 kali silang
1(x - 1) = 2(5)
x - 1 = 10
x = 10 + 1
x = 11
atau
5 / (x - 1) = -1/2
-1(x - 1) = 2(5)
-x + 1 = 10
-x = 9
x = -9