Question

Ex 2 pls am nevoie mult

Answer 1

$\it a-b=51 \Rightarrow a=51+b\ \ \ \ (1)\\ \\ a:b=3\ rest\ 5 \Rightarrow a=3b+5\ \ \ \ \ (2)\\ \\ (1),\ (2) \Rightarrow 3b+5=51+b \Rightarrow 3b-b=51-5 \Rightarrow 2b=46 \Rightarrow b=23\ \ \ \ \ (3)\\ \\ (1),\ (3) \Rightarrow a=51+23 \Rightarrow a=74$