Question

1. 18a-7b+1 при a=5/9;b=1/7
2.

Answer 1

$18a - 7b + 1 = 18 \times \frac{5}{9} - 7 \times \frac{1}{7} + 1 = 2 \times 5 - 1 + 1 = 10$

Answer 2

Объяснение:

18a - 7b + 1 = 18 \times \frac{5}{9} - 7 \times \frac{1}{7} + 1 = 2 \times 5 - 1 + 1 = 1018a−7b+1=18×

9

5

−7×

7

1

+1=2×5−1+1=10