Explanation:
X+106=180 [(being cointerial angle]
or, X=180-106
or,X=74
therefore,X=74
2y=X=74[being corresponding angle]
X+(4z+6)=180[being exterior cointerior angle]
or, 74+6+4z=180
or,4z=180-80
or,4z=100
or,z=100/4
or,z=25
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