1) a + 48*20 = 5678;
a + 960 = 5678;
a = 5678 - 960;
a = 4718;
2) 560 : 8 - x = 45;
70 - x = 45;
x = 70 - 45;
x = 25;
1) a + 48*20 = 5678;
a + 960 = 5678;
a = 5678 - 960;
a = 4718;
2) 560 : 8 - x = 45;
70 - x = 45;
x = 70 - 45;
x = 25;