Question

Calcule ps valores de a+b=30 e que a/b= 4/5

Answer 1

a + b = 30

a = 30 - b

.

a/b = 4/5

5a = 4b

5 (30 - b) = 4b

150 - 5b = 4b

150 = 9b

b = 150/9

b = 50/3

.

a = 30 - b

a = 30 - 50/3

a = 40/3