The value of "x" is 5.

Given that,
A trapezium ABCD in which AB || CD such that
Now,











Answer choice B would result in no solution
Hope this helps ;)
The answer is 60 since the other shape has same answer for that side
The answer is that y is equal to -3 and x is equal to 7
2x-y=17
-2(x-y)=10 )
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2x-y=17
-2x+2y=-20
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y=-3
x-y=10
x-(-3)=10
x+3=10
-3 -3
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x=7