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