Respuesta :

Melody08

Answer:

20

Step-by-step explanation:

If a=3, b=7,

4a-5+3a-b-3+2b

= 4(3)-5+3(3)-7-3+2(7)

= 12-5+9-7-3+14

= 20

dawidel

Answer:

1. Simplified: 7a + b - 8

2. Evaluated: 20

Step-by-step explanation:

4a - 5 + 3a - b - 3 + 2b =

4a + 3a - b + 2b - 5 - 3 =

7a + b - 8

7a + b - 8 = 7 * 3 + 7 - 8 = 21 + 7 - 8 = 20

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