Răspuns :
a+b=240
a=4b+5
4b+5+b=240/-5
5b=235/:5=>b=47
a=4x47+5=>a=188+5=193
a=4b+5
4b+5+b=240/-5
5b=235/:5=>b=47
a=4x47+5=>a=188+5=193
a + b = 240
a : b = 4, r5 ⇒ a = 4b + 5
a + b = 240
4b + 5 + b = 240
5b + 5 = 240
5b = 240 - 5
5b = 235
b = 235 : 5
b = 47
a = 4b + 5
a = 4 · 47 + 5
a = 188 + 5
a = 193
//
a : b = 4, r5 ⇒ a = 4b + 5
a + b = 240
4b + 5 + b = 240
5b + 5 = 240
5b = 240 - 5
5b = 235
b = 235 : 5
b = 47
a = 4b + 5
a = 4 · 47 + 5
a = 188 + 5
a = 193
//