Please help :( if you can please also give a explanation. thanks

Mathematics

1 answer:

aliina [53]2 years ago

8 0

Answer:

x = 20

Step-by-step explanation:

since the triangle is a right angle, that means the angle is 90 degrees

equation:

30 + 3x = 90

subtract 30 on both sides

30 - 30 + 3x = 90 - 30

3x = 60

then divide each side by 3

$\frac{3x}{3} = \frac{60}{3}$

x = 20

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