Question

2(8+3а)+7(а-1)при. а=7; 5 ;

Answer 1

2(8 + 3 * 7) + 7(5 - 1) = 86
1) 3 * 7 = 21
2) 8 + 21 = 29
3) 5 - 1 = 4
4) 2 * 29 = 58
5) 7 * 4 = 28
6) 58 + 28 = 86