Tolong ya nomor 3 yg b sama c aja.makasiii

B. 3x.1 - 3.2 = x + 4
3x-6 = x+4
X = 5
C. 2x.x - 0.0 = 9x - 7.1
2x^2 -9x + 7 = 0
X1 = 7/2
X2 = 1