Question

calcule o valor numérico das expressões

Answer 1

A) x-y=> 5-(-4)= 5+4= 9
B)3x+a=> 3x(2)+6= 6+6= 12
C)2x+m=> 2x(1)+(-3)= 2-3=1
D)m-2a=> 3-(2x-5)= 3-(-10)= 3+10=13
E)x+y=> 1/2+1/5= (5+2)/10= 7/10
F)a-b=> 3-1/2= (6-1)/2= 5/2