In rectangles of area one square meter, as the length of one side changes so does the length of the other side. Write the relation between the lengths as an algebraic equation. How do we say this in the language of proportions?

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step-by-step explanation:

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step-by-step explanation:

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let's solve your equation step-by-step.

4x+2=2x+12

step 1: subtract 2x from both sides.

4x+2−2x=2x+12−2x

2x+2=12

step 2: subtract 2 from both sides.

2x+2−2=12−2

2x=10

step 3: divide both sides by 2.

2x

2

=

10

2

x=5

step-by-step explanation:

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answer: d.) the total number of protons and neutrons is 15

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