Question

Para x=4. Qual o valor numérico das expressões.

a) 2x+3x+1
( )15 ( )20 ( )21 ( )nda

b)x-2x+10

( )4 ( )6 ( )9 ( )nda
​

Answer 1

Resposta:

a)2×4+3×4+1=8+12+1=21 b)4-2×4+10=4-8+10=6