Respuesta:
[tex] 7+4+x-6=5+4 \\ 5 + x = 9 \\ x = 9 - 5 \\ x = 4 [/tex]
[tex] 12-8+y-3=21+4 \\ 1 + y = 25 \\ y = 25 - 1 \\ y = 24 [/tex]
[tex] 3+2a-8-5=25+3 \\ - 10 + 2a = 28 \\ 2a = 28 + 10 \\ 2a = 38 \\ a = \frac{38}{2} \\ a = 19[/tex]
[tex] 20+4-10+4p=65-34 \\ 14 + 4p = 31 \\ 4p = 31 - 14 \\ 4p = 17 \\ p = \frac{17}{4} [/tex]
