tentukan penyelesaian dari persamaan berikut : 1. 3x = 12 2. 5a-12=8 3. 4y+10=2y-14 4. 5(a+3) =30 5. 6x + 12>4
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No.1
3x = 12
x = 12/3
x = 4
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No.2
5a - 12 = 8
5a = 8 + 12
5a = 20
a = 20/5
a = 4
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No.3
4y + 10 = 2y - 14
4y - 2y = -14 - 10
2y = -24
y = -24/2
y = -12
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No.4
5(a + 3 ) = 30
a + 3 = 30/5
a + 3 = 6
a = 6 - 3
a = 3
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No.5
6x + 12 > 4
6x > 4 - 12
6x > -8
x > -8/6
x > -4/3
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