Question

si a vale = 2 b vale = -3 c vale = 1

2a-(a-3b+4c)-5

porfa

Answer 1

$2(2) - (2 - 3 \times - 3 + 4 \times 1) - 5 \\ 4 - (2 + 9 + 4) - 5 \\ = 4 - 15 - 5 \\ = - 16$