Question

a) ab+ba=176 a+b=?
b) 3ab+5ab=860 a+b=?

Answer 1

a)ab+ba= 176
10a+b+10b+a= 176
11a+11b = 176
11(a+b) = 176
a+b = 176:11
a+b = 16
la pct. b) nu inteleg cerinta este vorba de numar de forma 3ab sau produsul dintr 3, a,b

Answer 2

ab + ba = 176 , 2ab = 176 , b = 176/2a = 88/a , a + b = a + 88/a = (a² + 88)/a
3ab + 5ab = 860 , 8ab = 860 , b = 860/8a = 215/2a , a + b = a + 215/2a =
= (2a² + 215)/2a