Question

calcule o valor numérico das expressões algébricas para a=2,b=4 e x =35

Answer 1

   x-4       35-4        31
-------- = -------- = -------- = 4,42
  a+5       2+5          7

   a+3b       2+3.4        2+12
----------- = ---------- = -------- = 14
  2a-4          2.2-4       4-4


     2a+3b       2.2+34         4+34           38
-------------- = ------------ = ----------- = ----------- = 19
        a                2                2               2

    a-1          2-1            1
---------- = ---------- = --------- = 0,1
   5a            5.2            10