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4 years ago

5

-2x+3y-5x-(-8y)+9y= please help me

2 answers:

crimeas [40]4 years ago

8 0

The answer would be -7x + 20y

-2x + 3y - 5x - ( -8y ) + 9y
When there are two negative signs one after another, it turns into a positive.
-2x + 3y -5x + 8y + 9y
Now you need to add up all common numbers.
-2x - 5x = -7x
3y + 8y + 9y = 20y

The remaining two numbers don't have a common variable, so they stay separate;
-7x + 20y

Korvikt [17]4 years ago

7 0

Hello.

The answer is <span>−<span>7x</span></span>+<span>20y</span>

Simply like terms
<span><span><span><span><span><span>−<span>2x</span></span>+<span>3y</span></span>−<span>5x</span></span>−</span>−<span>8y</span></span>+<span>9y

</span></span><span>=<span><span><span><span><span><span>−<span>2x</span></span>+<span>3y</span></span>+</span>−<span>5x</span></span>+<span>8y</span></span>+<span>9y

</span></span></span>Combine Like Terms:

<span>=<span><span><span><span><span>−<span>2x</span></span>+<span>3y</span></span>+<span>−<span>5x</span></span></span>+<span>8y</span></span>+<span>9y

</span></span></span><span>=<span><span>(<span><span>−<span>2x</span></span>+<span>−<span>5x</span></span></span>)</span>+<span>(<span><span><span>3y</span>+<span>8y</span></span>+<span>9y</span></span>)

</span></span></span><span>=<span><span>−<span>7x</span></span>+<span>20<span>y

Have a nice day</span></span></span></span>

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