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15. Solve for [tex]\( y \)[/tex] in the equation:
[tex]\[ y = 2x + 3 \][/tex]

Sagot :

To find the value of [tex]\( y \)[/tex] for a given [tex]\( x \)[/tex] in the linear equation [tex]\( y = 2x + 3 \)[/tex], let's break down the steps for a specific example. Suppose we are solving for [tex]\( x = 15 \)[/tex].

### Step-by-Step Solution:

1. Identify the equation:

The given equation is:
[tex]\[ y = 2x + 3 \][/tex]

2. Substitute [tex]\( x \)[/tex] with the given value:

Here, [tex]\( x = 15 \)[/tex]. So, substitute [tex]\( x \)[/tex] in the equation:
[tex]\[ y = 2(15) + 3 \][/tex]

3. Perform the multiplication:

First, compute [tex]\( 2 \times 15 \)[/tex]:
[tex]\[ 2 \times 15 = 30 \][/tex]

4. Add the constant term:

Now, add 3 to the result:
[tex]\[ 30 + 3 = 33 \][/tex]

So, when [tex]\( x = 15 \)[/tex], the value of [tex]\( y \)[/tex] is:
[tex]\[ y = 33 \][/tex]

### Conclusion:

For the given value of [tex]\( x = 15 \)[/tex], the corresponding value of [tex]\( y \)[/tex] in the linear equation [tex]\( y = 2x + 3 \)[/tex] is:

[tex]\[ y = 33 \][/tex]

Thus, the point [tex]\((15, 33)\)[/tex] lies on the line described by the equation [tex]\( y = 2x + 3 \)[/tex].