Answer:
Answers are below.
Step-by-step explanation:
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This is geometry. how would I find the x pretty pls help
1 answer:
Answer:
x = 70°
Step-by-step explanation:
We are given that two of the sides are congruent so that will make the triangle isosceles.
We know also that the base angles of an isosceles triangle are congruent so we know a second angle.
< 1 = 55° ( given)
< 2 = 55° ( isosceles Δs have base <s ≅)
Using the fact that the sum of angles in a triangle is 180° we can find the third angle.
< 3 = 180 -55-55 = 70°
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Answers:
The starting equation is (x+5)/3 = 7 which can be written as
The solution to this equation is x = 16
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Explanation:
Let x be a placeholder for some number. If we start off with some number and add on 5, then we go from x to x+5. The next thing we do is divide all of "x+5" all over 3 to get (x+5)/3 which can be written as . I'll use the first style of notation.
Set the expression (x+5)/3 equal to 7 and that leads us to the equation:
(x+5)/3 = 7
so this is the first part of the answer. Now onto the second part which is solving for x. We want to get x all by itself on its own side.
To do this, we follow the order of operations PEMDAS in reverse. So we undo division first by multiplying both sides by 3. Then we undo the addition of 5 by subtracting 5 from both sides
(x+5)/3 = 7
3*(x+5)/3 = 3*7 ...... multiply both sides by 3
x+5 = 21
x+5 - 5 = 21 - 5 ..... subtract 5 from both sides
x = 16
So the unknown mystery number is 16. As a check, note how adding 5 to 16 gets us 16+5 = 21, which if we divide by 3 we end up with 21/3 = 7 which is what we want. So the answer is confirmed.