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Verified answer
1.2y = 3+5y
2y - 5y = 3
-3y = 3
y = 3/-3
y = -1
2.
4-a = 10
-a = 10-4
-a = 6
a = 6/-1
a = -6
3.
2(y-1) = 10
2y -2 = 10
2y = 10+2
2y = 12
y = 12/2
y = 6
4.
5.