Question

Tentukan penyelesaian persamaan berikut!
(Paket "bse" matematika kls 7 lat.4 hal 66 (no.2 yg b)
8 + 3(x + 1) = -4

Tentukan nilai variabel dari persamaan berikut!
(Paket "bse" matematika kls 7 lat.7 hal 67 (no.1 yg b,f,h)
b. 9/2 x + 12 = 3/2 x - 2

f.6x - 3/2 - 3 = 4x - 2/3 + 6

h.2x + 8/3 - 4[2 - 3 (2x - 2)]/8 = 12

Answer 1

B. 9/2x -3/2x= -2-12
   3x= -14
    x= -14/3
f. 6x-4x= 6+3+3/2-2/3
   2x=41/6
    x= 41/12
h. 2x+8/3=12 - 4(2-3(2x-2))/8
   2x+8/3=(96-4(2-3(2x-2))/8
(6x+8)/3=(96-4(2-3(2x-2))/8
(6x+8)/3= (96-48-24x)/8
(6x+8)/3=(48-24x)/8
144-72x=48x+64
80=120x
2/3=x