Question

What number should be added to 7/12 to get 4/15

Answer 1

Answer:

-51/ 60 should be added to 7/12 to get -4/15.

Step-by-step explanation:

Answer 2

Answer:

Required number is $( - \frac{19}{60} )$

Step-by-step explanation:

Given two numbers are

$\frac{7}{12}$ and $\frac{4}{15}$

Here we want to find what number should be added to $\frac{7}{12}$ and $\frac{4}{15}$

Let required number be x.

According to question,

$\frac{7}{12} + x = \frac{4}{15}$

We are separating variable and constant part,

$x = \frac{4}{15} - \frac{7}{12}$

By fraction's subtraction rule,

$x = \frac{4 \times 4 - 7 \times 5}{60} \\ x = \frac{16 - 35}{60} \\ x = - \frac{19}{60}$

This is a problem of Algebra.

Some important Algebra formulas.

(a + b)² = a² + 2ab + b²

(a − b)² = a² − 2ab − b²

(a + b)³ = a³ + 3a²b + 3ab² + b³

(a - b)³ = a³ - 3a²b + 3ab² - b³

a³ + b³ = (a + b)³ − 3ab(a + b)

a³ - b³ = (a -b)³ + 3ab(a - b)

a² − b² = (a + b)(a − b)

a² + b² = (a + b)² − 2ab

a² + b² = (a − b)² + 2ab

a³ − b³ = (a − b)(a² + ab + b²)

a³ + b³ = (a + b)(a² − ab + b²)

Know more about Algebra,

1) https://brainly.in/question/13024124

2) https://brainly.in/question/1169549