Question

the ratio of 2 numbers is 5:7. If 40 is added in each number then the ratio becomes ​

Answer 1

Answer:

Option A)12

Step-by-step explanation:

$\frac{5x + 40}{7x + 40} = \frac{25x}{31x} \\ = ) \frac{5x + 40}{7x + 40} = \frac{25}{31} \\ = )31(5x + 40) = 25(7x + 40) \\ = )155x + 1240 = 175x + 1000 \\ = )155x - 175x = 1000 - 1240 \\ = ) - 20x = - 240 \\ = )x = 12$

Hope it helped