hey guys can you answer these questions I will thank you and mark as brainlist ,answer it quick and correct
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2)
1. 3x = 21
x= 3/21
x = 7
2. 3x + 5 =15
= 3x = 15 - 5
= 3x = 10
= x = 3/10
3. x/2 + 7= 4
= x/2 = 4-7
= x/2 = 3
= x = 3×2
= x = 6
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