Answer:
1) x = 2
2) x = 5
3) x = 3
Explanation:
1) 8x + 4 = 20
8x = 20 - 4
8x = 16
x = 2
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2) 5x + 2 =27
5x = 27 - 2
5x = 25
x = 5
-----------------------------
3) 3x + 6 = 15
3x = 15-6
3x = 9
x = 3
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