Question

Afla numerele necunoscute. a)a+54=69; a+34=40; b)20+b=90; 37+b=50; c)c-42=8; c-33=29; d)80-d=55; 63-d=36;

Answer 1

$a) a+54=69=\ \textgreater \ a=69-54=\ \textgreater \ a=15$

[tex]a+34=40=\ \textgreater \ a = 40-34=\ \textgreater \ a=6 [/tex]

$b)20+b=90=\ \textgreater \ b=90-20=\ \textgreater \ b=70$

$37+b=50=\ \textgreater \ b=50-37=\ \textgreater \ b=13$

$c)c-42=8=\ \textgreater \ c=8+42=\ \textgreater \ c=52$

$c-33=29=\ \textgreater \ c=29+33=\ \textgreater \ c=62$

[tex]d)80-d=55=\ \textgreater \ d=80-55=\ \textgreater \ d=25 [/tex]

$63-d=36;=\ \textgreater \ d=63-36=\ \textgreater \ d = 27$