find the angles of quad. if angle a=2x-1, b=y+5, c=2y+15 and d=4x-7
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Step-by-step explanation:
In any quadrilateral sum of 4 angles must be 360.
∴ ( a + b + c + d ) = 360
( 2x - 1 ) + ( y + 5 ) + ( 2y + 15 ) + ( 4x - 7 ) = 360
2x - 1 + y + 5 + 2y + 15 + 4x - 7 = 360
6x + 3y +12 = 360
6x + 3y = 360 - 12 = 348
3 ( 2x + y ) = 348
2x + y = 348 / 3 = 116
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