Question

stan si radu au 580 de timbre cate timbre au fiecare daca radu are cu 298 mai mult decat stan

Answer 1

Sa zicem ca Stan are x timbre, iar Radu y timbre.
x+y=580
y=298+x
si inlocuim:

298+x+x=580
2x=580-298
2x=282
x=282 : 2=141 timbre
y=298+x => y=298+141=439 timbre

Answer 2

S + R = 580
R = S + 298
S + S + 298 = 580
2S = 580 - 298
S = 282 : 2
S = 141 timbre are Stan
R = 141 + 298
R = 439 timbre are Radu