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Mathematics, 02.03.2021 19:50 brainbean

Can someone please help with this? I am so confused substitute a
-13 ; b = -9 ; C = 2 and evaluate each expression.
17. 2c + b - a + 14
18. -(-2a) + 16 - b2
19. -3b + C - a + 4

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Can someone please help with this? I am so confused substitute a
-13 ; b = -9 ; C = 2 and eva...
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