Math  /  Algebra

QuestionComplete the table for the given rule. Rule: y=x+3y = x + 3

Studdy Solution

STEP 1

What is this asking? Given the rule y=x+3y = x + 3, we need to find the missing xx values in the table for the given yy values. Watch out! Don't mix up xx and yy!
Remember, we're solving for xx, not yy.

STEP 2

1. Solve for x when y = 4
2. Solve for x when y = 8
3. Solve for x when y = 5

STEP 3

Alright, let's **start** with our given rule: y=x+3y = x + 3.
We know that in this case, our **y-value** is **4**.
Let's **plug it in**!

STEP 4

So, we have 4=x+34 = x + 3.
Now, we want to **isolate** that mischievous xx, so we'll **subtract 3** from *both* sides of the equation.
Remember, what we do to one side, we *must* do to the other to keep things balanced!

STEP 5

43=x+334 - 3 = x + 3 - 3 1=x1 = x Boom! We found our **first x-value**: x=1x = 1 when y=4y = 4.

STEP 6

Back to our trusty rule: y=x+3y = x + 3.
This time, our **y-value** is **8**.
Let's **substitute** that in.

STEP 7

We get 8=x+38 = x + 3.
To **get x by itself**, we'll **subtract 3** from both sides.

STEP 8

83=x+338 - 3 = x + 3 - 3 5=x5 = x Awesome! Our **second x-value** is x=5x = 5 when y=8y = 8.

STEP 9

One more time with feeling!
Our rule is y=x+3y = x + 3, and our **y-value** is **5**.
Let's **plug it in**!

STEP 10

So, 5=x+35 = x + 3.
We'll **subtract 3** from both sides to **isolate x**.

STEP 11

53=x+335 - 3 = x + 3 - 3 2=x2 = x Fantastic! Our **final x-value** is x=2x = 2 when y=5y = 5.

STEP 12

When y=4y = 4, x=1x = 1. When y=8y = 8, x=5x = 5. When y=5y = 5, x=2x = 2.

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