Respuesta :

Answer:

7.7.

Step-by-step explanation:

7[63 ÷ (52 – 22) – 1]

Inner parentheses are calculated first:

=  7[63 ÷ 30– 1]

Now the division

= 7[ 2.1 - 1]

= 7 * 1.1

= 7.7.