Question

Determina numerele a si b stiind ca a×b=240 si a×(b+5)=300

Answer 1

(1) a×b=240
(2) a×(b+5)=300=>a×b+b×5=300
Din (1) si (2)=> a×b+b×5=300=>240+b×5=300=>b×5=300-240=>b×5=60=>
b=60 ÷ 5=> b=12=> a×b=240=>a×12=240=>a=240 ÷ 12=> a=20
Deci (a,b)={20,12}