---
id: 56533eb9ac21ba0edf2244b0
title: Compound Assignment With Augmented Subtraction
challengeType: 1
videoUrl: https://scrimba.com/c/c2Qv7AV
forumTopicId: 16660
localeTitle: Соединение с расширенной вычитанием
---

## Description
<section id='description'>
Как и оператор <code>+=</code> , <code>-=</code> вычитает число из переменной. <code>myVar = myVar - 5;</code> вычитает <code>5</code> из <code>myVar</code> . Это можно переписать как: <code>myVar -= 5;</code>
</section>

## Instructions
<section id='instructions'>
Преобразуйте присвоения для <code>a</code> , <code>b</code> и <code>c</code> для использования оператора <code>-=</code> .
</section>

## Tests
<section id='tests'>

```yml
tests:
  - text: <code>a</code> should equal <code>5</code>
    testString: assert(a === 5);
  - text: <code>b</code> should equal <code>-6</code>
    testString: assert(b === -6);
  - text: <code>c</code> should equal <code>2</code>
    testString: assert(c === 2);
  - text: You should use the <code>-=</code> operator for each variable
    testString: assert(code.match(/-=/g).length === 3);
  - text: Do not modify the code above the line
    testString: assert(/var a = 11;/.test(code) && /var b = 9;/.test(code) && /var c = 3;/.test(code));

```

</section>

## Challenge Seed
<section id='challengeSeed'>

<div id='js-seed'>

```js
var a = 11;
var b = 9;
var c = 3;

// Only modify code below this line

a = a - 6;
b = b - 15;
c = c - 1;

```

</div>

### After Tests
<div id='js-teardown'>

```js
(function(a,b,c){ return "a = " + a + ", b = " + b + ", c = " + c; })(a,b,c);

```

</div>

</section>

## Solution
<section id='solution'>

```js
var a = 11;
var b = 9;
var c = 3;

a -= 6;
b -= 15;
c -= 1;
```

</section>