Question

3. Află numărul necunoscut.
145 + m – 317 = 631
368 + 247 - n = 802
p - 176 + 239 = 467
​

Answer 1

Explicație pas cu pas:

145+m-317=631

145+m=631+317

145+m=948

m=948-145

m=803

368+247-n=802

615-n=802

n=615-802

n=-187

p-176+239=467

p-176=467-239

p-176=228

p=228+176

p=404

Answer 2

$145+m-317=631$

$145+m=631+317$

$145+m=948$

$m=948-145$

$\boxed{m=803}$

$368+247-n=802$

$615-n=802\:\:\:|+n\:\:\:\:\text{\it adunam relatia cu n}$

$615 -n +n = 802 +n$

$n=615-802$

$\boxed{n=-187}$

$p-176+239=467$

$p-176=467-239$

$p-176=228$

$p=228+176$

$\boxed{p=404}$