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Andrew
[12]
3 years ago
13
Math help will give brainliest what is X and M angle A
Mathematics
Answer
Comment
Send
1
answer:
Anna
[14]
3 years ago
3
0
Supplementary = 180 degrees...
A + B = 180
3x + 12 + 7x + 38 = 180
10x + 50 = 180
10 x = 130
x = 13
To find the A just substitute x in...
3
( 13)
+ 12
A = 51
To check substitute the x..
A + B = 180
3(
13
) + 12 + 7(
13
) + 38 = 180
51 + 129 = 180
180 = 180
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