tolong jawab skola nomor 41,42,43,44

41. 2a + 7 = 19
2a = 19-7
2a = 12
a = 6

42. 2x-3 = 5
2x = 8
x = 4

44. 1/3x - 5 = 10
1/3x = 15
x = 15 . 3
x = 45