Question

A=3,с=4(645+567+187)с -659а​

Answer 1

(645+567+187)с-659а=1399с-659а

5596-1977=3619

Answer 2

It seems like you're trying to create an expression with variables A and C and some arithmetic operations. Let's break down your expression:

A = 3 C = 4 * (645 + 567 + 187) * C - 659 * A

However, there seems to be a problem in your expression. You've defined C in terms of itself, which creates a circular reference. It's not clear how C should be calculated with this circular reference. If you can provide more information or clarify your intention, I'd be happy to assist further.