Step-by-step explanation:
a=<u>bx + cx</u>
2
2*a=<u>x(b+c)</u>*2
2
<u>2a</u> = <u>x(b+c)</u>
(b+c) (b+c)
<u>2a</u> = x
(b+c)
The 3 angles of a triangle add up to 180 degrees so:-
10x - 10 + 10x + 8 + 8x = 180
28x = 180 + 10 - 8
28x = 182
x = 6.5 (answer)
Answer:
x=25°
Step-by-step explanation:
54+7(x-7)=180°
54+7x-49=180°
7x+5=180
-5 -5
7x=175
7x/7=175/7
x=25
hopefully this helps :)