Help with math

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x=

Step-by-step explanation:

First, we need to solve the angle inside the triangle. That would be 55+40+angle measure=180

angle measure=85°

Now that we know that, we can solve for x by setting 85-3x-18 equal to 180° because these two values form a linear pair which is 180°.

Let's use some simple algebra to solve for x:

85-3x-18=180

67-3x=180

-3x=113

x= or about -37.67

Hope this helps!! :)

y= -1

Step-by-step explanation:

Because you have the point (3,y), you now know that x is 3 because coordinates come in (x,y) forms. So you would plug in 3 for x. 5(3)-3y=18. Then continue to solve by subtracting 15 from both side and getting -3y=3. Divide from -3 on both sides and get y= -1