Răspuns :
a + 30 : 3 = 8 x 3
a + 10 = 24
a = 24 - 10
a = 14
a - 3 x 8 - 5 = 80 : 2
a - 24 - 5 = 40
a - 19 = 40
a = 40 + 19
a = 59
45 : 5 = a : 3
a : 3 = 9
a = 3 x 9
a = 27
a + 10 = 24
a = 24 - 10
a = 14
a - 3 x 8 - 5 = 80 : 2
a - 24 - 5 = 40
a - 19 = 40
a = 40 + 19
a = 59
45 : 5 = a : 3
a : 3 = 9
a = 3 x 9
a = 27
ex 1:
a + 30 : 3 = 8 x 3
a + 10 = 24
a = 24 - 10
a = 14
ex 2.
a - 3 x 8 - 5 = 80 : 2
a - 24 - 5 = 40
a - 19 = 40
a = 40 + 19
a = 59
ex 3.
45 : 5 = a : 3
a : 3 = 9
a = 3 x 9
a = 27
a + 30 : 3 = 8 x 3
a + 10 = 24
a = 24 - 10
a = 14
ex 2.
a - 3 x 8 - 5 = 80 : 2
a - 24 - 5 = 40
a - 19 = 40
a = 40 + 19
a = 59
ex 3.
45 : 5 = a : 3
a : 3 = 9
a = 3 x 9
a = 27