1.) 2y = y + 4
2.) 3 ( y + 2 )= 12
3.) 5a + 4 = 2 (a+5)
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= 2y - y = 4
y = 4 :)
2) 3 (y + 2) = 12
3y + 6 = 12
3y = 12 - 6
y = 6:3 = 2 :)
3) 5a + 4 = 2 (a+5)
5a + 4 = 2a + 10
5a - 2a = 10 - 4
3a = 6
a = 6:3 = 2 :)