bantu di jawab ya. soalx mau di kumpul besok nhi.
Matematika
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Pertanyaan
bantu di jawab ya. soalx mau di kumpul besok nhi.
1 Jawaban
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1. Jawaban wiyama
1.) 3x + 2 = 8
3x = 8 - 2
3x = 6
x = 6/3
x = 2
2.) 2(3x + 6) = 3(x - 2)
6x + 12 = 3x - 6
6x - 3x = -12 - 6
3x = -18
x = -18/3
x = - 6
3.) 1/2(p - 3) + 2/3(3p + 6) = 15
1/2p - 3/2 + 2p + 4 = 15
1/2p + 2p = 15 - 4 + 3/2
5/2 p = 11 + 3/2
5/2 p = 22/2 + 3/2
5/2 p = 25/2
p = (25/2) ÷ (5/2)
p = 25/2 × 2/5
p = 5
4.) 3x - 4 = x - 8
3x - x = 4 - 8
2x = -4
x = -4/2
x = -2
5.) 5p - p = - 16
4p = - 16
p = - 16/4
p = - 4
6.) 2/3(2x + 3) = 6
4/3x + 2 = 6
4/3x = 6 - 2
4/3x = 4
x = 4 ÷ 4/3
x = 4 × 3/4
x = 3
7.) r + 5 = 7
r = 7 - 5
r = 2
8.) (2y - 3)/2 + (5y + 4)/4 = 4
2(2y - 3)/4 + (5y - 4)/4 = 4
(4y - 6 + 5y - 4)/4 = 4
4y + 5y - 6 - 4 = 4 × 4
4y + 5y - 6 - 4 = 16
9y - 10 = 16
9y = 16 + 10
9y = 26
y = 26/9
y = 2 8/9
9.) 5x + 3 = 2x - 9
5x - 2x = -3 - 9
3x = -12
x = -12/3
x = - 4
10.) (2x - 3)/2 = 4 + (5x + 6)/4
2(2x - 3)/4 - (5x + 6)/4 = 4
(4x - 6 - 5x - 6) 4 = 4
4x - 5x - 6 - 6 = 4 × 4
-x - 12 = 16
-x = 16 + 12
-x = 28
x = - 28