Question

m-(m+n)-3{-2m+[-2m-2(n-1)-(m+n-1)]}-(14m+8n-9)

Answer 1

Respuesta:

Solución = m

Explicación paso a paso:

$m-\left(m+n\right)-3\cdot \left[-2m+\left[-2m-2\left(n-1\right)-\left(m+n-1\right)\right]\right]-\left(14m+8n-9\right)=$

$=m-\left(m+n\right)-3\left(-2m-2m-2\left(n-1\right)-\left(m+n-1\right)\right)-\left(14m+8n-9\right)=$

$=m-\left(m+n\right)-3\left(-2m-2m-2n+2-m-n+1\right)-\left(14m+8n-9\right)=$

$=m-\left(m+n\right)-3\left(3-5m-3n\right)-\left(14m+8n-9\right)=$

$=m-m-n-9+15m+9n-14m-8n+9= m$;