1) 5(x+3)+7=3(x+12)5x + 15 + 7 = 3x + 365x + 22 = 3x + 362x = 14x = 7
2) 2(a+2)-10=6(3-a)2a + 4 - 10 = 18 - 6a2a - 6 = 18 - 6a8a = 24a = 3
3) 3(2y-1)+6(3y-4) = 83 + 5(y-3)6y - 3 + 18y - 24 = 83 + 5y - 1524y - 27 = 68 + 5y19y = 95y = 5
1) 5(x+3)+7=3(x+12)
5x + 15 + 7 = 3x + 36
5x + 22 = 3x + 36
2x = 14
x = 7
2) 2(a+2)-10=6(3-a)
2a + 4 - 10 = 18 - 6a
2a - 6 = 18 - 6a
8a = 24
a = 3
3) 3(2y-1)+6(3y-4) = 83 + 5(y-3)
6y - 3 + 18y - 24 = 83 + 5y - 15
24y - 27 = 68 + 5y
19y = 95
y = 5