Question

Tolong jawab donk....... PLEASE..........

4. Carilah himpunan penyelesaian dari persamaan-persamaan di bawah ini
a. -8x = 64
b. 3y - 1 = 17
c. 5k + 3 = 2k +18
d.

Answer 1

A) -8x = 64
   1/8 × -8x = 1/8 × 64
   -x = 8
   x = -8

b) 3y - 1 = 17
   3y - 1 + 1 = 17 + 1
   3y = 18
   1/3 x 3y =1/3 x 18
   y = 6

c)5k + 3 = 2k + 18
   5k-2k + 3 = 2x-2x + 18
   3k + 3 = 18
   3k + 3 - 3 = 18 - 3
   3k = 15
   1/3 x 3k = 1/3 x 15
   k = 5

d) (x+1)/3 = 2
   3/1 × [(x+1)/3] = 3/1 × 2
   x + 1 = 6
   x + 1 - 1 = 6-1
   x = 5

Answer 2

A. -8x = 64
x = 64/-8
x = -8
b. 3y - 1 = 17
3y = 17+1
3y =18
y = 18/3
y = 6

c. 5k + 3 = 2k +18
5k -2k = 18-3
3k = 15
k =15/3
k = 5