Question

a+b=125, b=20% din a... a, b=?​

Answer 1

b=20/100 *a=1/5 *a=a/5

a+b=125

a+a/5=125

5a+a/5=125

6a/5=125

6a=125*5

6a=625

a=625/6

b=(625/6)/5=625/6*5=125/6

Answer 2

Răspuns:

Explicație pas cu pas:

b = 20a/100 = a/5

a + b = 125

a + a/5 = 125

5a/5 + a/5 = 125

6a/5 = 125

a = 125*5/6 = 104,1(6)

b = a/5 = 125*5/6*5 = 125/6 = 20,8(3)