Answer: x= .
.
Step-by-step explanation: We are given a segment parallel to the base.
Therefore, sides of big triangle and small triangles would be in proportion.

Setting values for the shown triangle, we get


On cross multiplication, we get
16(2x+7) = 38(x)
32x + 112 = 38x.
Subtracting 112 from both sides, we get
32x + 112-112 = 38x -112
32x = 38x-112
Subtracting 38x from both sides, we get
32x-38x = 38x-38x-112
-6x = -112
Dividing both sides by -6, we get

x= .
.
<h3>Therefore, x= .

.</h3>
Answer:
Step-by-step explanation:
one angle is 80
let other angle be 'x'
then third angle will also be equal to x. (given)
using angle sum property,
x + x + 80 = 180. (1)
2x=100
x=50. (2)
therefore all angles are 80,50,50
hope this helps
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Answer:
x= y-10a/10
Step-by-step explanation:
Multiply 10 by x+a using the distributive property. 10x+10a=y
Subtract 10a from both sides. 10x=y-10a
Divide both sides by 10. 10x/10 = y-10a/10.
Dividing by 10 undoes the multiplication by 10. x=y-10a/10
Divide y-10a by 10.
I hope this helps and I'm sorry if I got this wrong. I tried my best. Thanks for the question :)