x = 1,2 × 3 + 3 × 9 / 5
x = 3,6 + 27 / 5
x = ( 5 ×3,6 ) / 5 + 27 / 5
x = 18 / 5 + 27 / 5
x = 45 / 5
x = 9
____________________
y = ( - 2 + 5 ) × 4 + 24 : ( - 8 ) - ( - 2 )³
y = 3 × 4 - 3 - ( - 8 )
y = 12 - 3 + 8
y = 9 + 8
y = 17
____________
Ma ( x; y ) = ( 9 + 17 ) / 2 = 26 / 2 = 13 → media aritmetica
