stevenseven
Kalo mau sih no 13 ya itu kan rumusnya 2m-1/3 =5 ngerjainnya tuh semua rumus dibalik tp angkanya masih sama jadi 5.3 tambah 1 jadi 16 ÷2 = 8 =m
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narifa
11) (4x+2)/3 - (2x + 1)/2 = (6x + 3)/4 (kedua ruas dikalikan 12) 4(4x+2) - 6(2x+1) = 3(6x+3) 14x+8-12x-6 = 18x+8 2x+2 = 18x+8 2x-18x = 8-2 14x = 6 x = 6/14 x = 3/7 12) K = 2(p+l) 60 = 2 (p +p - 6) 60 = 4p - 12 60 + 12 = 4p 72 = 4p 18 = p l = p - 6 = 18 - 6 = 12 L = pl = 18 x 12 = 216m 13) 2m - 1 = 5(3) 2m - 1 = 15 2m = 16 m = 8 14) 65 - 5y ≥ 9y - 2y + 5 - 5y - 9y + 2y ≥ 5 - 65 - 12y ≥ -60 y ≤ 5 15) 4x - 12 ≥ x + 3 4x - x ≥ 3 +12 3x ≥ 15 x ≥ 5 16) - 6x - 3x > -12 + 6 - 9x > -6 x < 2/3 17) kedua ruas dikalikan KPK penyebut = 30 30(2x-3) - 15(x-3) ≤ (6)6 60x - 90 - 15x + 45 ≤ 36 45x + 45 ≤ 36 45x ≤ 9 x ≤ 5 18) 4x + 1 < 9 4x < 8 x < 2 x adalah bilangan asli, x = 1 19) 3x - 6 + 7 ≥ x + 19 3x - x ≥ 19 -1 2x ≥ 18 x ≥ 9 21) 2x + (2x +2) + (3x + 1) = 24 7x +3 = 24 7x = 21 x = 3 sisi terpanjang = 3x + 1 = 10cm 22) x - 5 ≥ 7 - 2x x + 2x ≥ 7 + 5 3x ≥ 12 x ≥ 4
4(4x+2) - 6(2x+1) = 3(6x+3)
14x+8-12x-6 = 18x+8
2x+2 = 18x+8
2x-18x = 8-2
14x = 6
x = 6/14
x = 3/7
12) K = 2(p+l)
60 = 2 (p +p - 6)
60 = 4p - 12
60 + 12 = 4p
72 = 4p
18 = p
l = p - 6 = 18 - 6 = 12
L = pl = 18 x 12 = 216m
13) 2m - 1 = 5(3)
2m - 1 = 15
2m = 16
m = 8
14) 65 - 5y ≥ 9y - 2y + 5
- 5y - 9y + 2y ≥ 5 - 65
- 12y ≥ -60
y ≤ 5
15) 4x - 12 ≥ x + 3
4x - x ≥ 3 +12
3x ≥ 15
x ≥ 5
16) - 6x - 3x > -12 + 6
- 9x > -6
x < 2/3
17) kedua ruas dikalikan KPK penyebut = 30
30(2x-3) - 15(x-3) ≤ (6)6
60x - 90 - 15x + 45 ≤ 36
45x + 45 ≤ 36
45x ≤ 9
x ≤ 5
18) 4x + 1 < 9
4x < 8
x < 2
x adalah bilangan asli, x = 1
19) 3x - 6 + 7 ≥ x + 19
3x - x ≥ 19 -1
2x ≥ 18
x ≥ 9
21) 2x + (2x +2) + (3x + 1) = 24
7x +3 = 24
7x = 21
x = 3
sisi terpanjang = 3x + 1 = 10cm
22) x - 5 ≥ 7 - 2x
x + 2x ≥ 7 + 5
3x ≥ 12
x ≥ 4