Question

Suma a 2 nr. y 343 , iar diferenta e 129.
care sunt cele 2 nr?

Answer 1

$x+y=343 \\ x-y=129 \\ x=(129+343):2 \\ x=472:2 \\ \boxed{x=236} \\ 236+y=343 \\ y=343-236 \\ \boxed{y=107}.$

Answer 2

a+b=343
a-b=129
a+b+a-b=343+129
2a=472
a=472:2
a=236
b=343-236=107