Respuesta :
times z both sides
2a+2b=5cz
minus 2b both sides
2a=5cz-2b
[tex]a= \frac{5cz-2b}{2} [/tex]
2a+2b=5cz
minus 2b both sides
2a=5cz-2b
[tex]a= \frac{5cz-2b}{2} [/tex]