20. If in the equation x + 2y = 10, the value of y is 6, then the value of
x will be
(A)-2
(B) 2
(C) 4
(D) 5
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Answer:
substitute the value of y i.e. 6 in the given equation x+2y = 10
x+2y=10
or, x+2×6=10
or, x+12=10
therefore, x=10-12
=-2
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