Question

First question
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Answer 1

Two opposite interior angles gives one exterior

3x + (4x+5) = 68

7x = 63

x= 9

therefore

for 3x = 27,. 4x+5=4(9)+5 =41

Answer 2

Explanation:

4x+5+3x=68

x=9

Two angle that form a line is a linear pair, which mean its 180 degree

180-68=112

X=9

Missing angle is 112

All the angles sum up to 180