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Lilit [14]
3 years ago
7

Help please thank you

Mathematics
1 answer:
Ad libitum [116K]3 years ago
5 0
In order for the triangle to be isosceles, we have to set two lengths of the triangle equal to each other. 

Let's take the lengths 5x-12 and x+20 and set them equal to each other. 

5x - 12 = x + 20 

Combine like terms by moving them over to their respective sides.

Subtract x from both sides of the equation. 

4x - 12 = 20 

Add 12 to both sides of the equation. 

4x = 32 

Divide both sides by 4. 

x = 8 

Check your answer by substituting. 

5x - 12 = x + 20

5(8) - 12 = 8 + 20

40 - 12 = 28 

28 = 28

Solution: x = 8 




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3 years ago
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Sladkaya [172]
I will go about solving this using the elimination method.

First, convert the equations.

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Second, find the easiest variable to get rid of and get rid of it!  (In this case, y)  We will subtract to get rid of y.

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Third, you want to solve the equation.

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Fourth, solve for y by inserting the answer for x into one of the equations.

10(-1 \frac{1}{3}) + y = -20
-13 \frac{1}{3} + y = -20 (subtract -13 \frac{1}{3})
y = -6 \frac{2}{3}

The solution for this system of equations is (-1 \frac{1}{3}, -6 \frac{2}{3}).
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Step-by-step explanation:

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