Question

Tentukan penyelesaian dari setiap persamaan berikut :
a. s - 3 = (-2s) + 6
b. 2a - 5 = a + 3
c.3 ( 5 - p ) =4 (3p + 2) + 37
d.3 (k + 5) + 4 (1 - k) = 8
tolong bantuin ya

Answer 1

A.
s - 3 = -2s + 6
s - 3 - s = -2s + 6 - s
- 3 = -3s + 6
- 3 - 6 = -3s + 6 - 6
- 9 = - 3s
-9 : -3 = -3s : -3
3 = s
b.
2a - 5 = a + 3
2a - 5 + 5 = a + 3 + 5
2a = a + 8
2a - a = a + 8 - a
a = 8

c.
3(5 - p) = 4 (3p + 2) + 37
15 - 3p = 12p + 8 + 37
15-3p+3p =12p+45 +3p
15 = 15p + 45
15 - 45 = 15p + 45 - 45
-30 = 15p
-30 : 15 = 15p : 15
-2 = p

d.
3(k + 5) + 4(1 - k) = 8
3k + 15 + 4 - 4k = 8
-k + 19 = 8
-k + 19 - 19 = 8 - 19
-k = -11
-k : -1 = -11 : -1
k = 11


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