3 years ago

Which property was used to simplify the expression? 3c+9+4c=3c+4c+9

Mathematics

1 answer:

xenn [34]3 years ago

3 0

Answer:

It seems to be the Commutative Property of Addition,

Where the order of elements can be changed without affecting the sum.

But state that $3c+9+4c=3c+4c+9$ is an equation.

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Read 2 more answers

A number plus itself, plus twice itself, plus 4 times itself is equal to -104

NARA [144]

The scenario will will be represented by: $x+x+2x+4x=-104$

The number will be -13

Step-by-step explanation:

We have to convert the given situation into the mathematical form

Let x be the number

Then

"a number plus itself"

x+x

"plus twice itself"

x+x+2x

"plus 4 times itself"

x+x+2x+4x

"is equal to -104"

$x+x+2x+4x=-104$

This can also be written as:

$x+x+2x+4x=-104\\8x=-104\\Dividing\ both\ sides\ by\ 8\\\frac{8x}{8}=\frac{-104}{8}\\x=-13$

Keywords: Linear Equation

Learn more about linear equation at:

#LearnwithBrainly

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