is (4,-18) a solution of 4x+5y=1?
回答 (5)
2015-08-31 8:39 am
Is
4(4)+5(-18)=1 ?
4(4)+5(-18)=1 ?
2015-08-31 8:57 am
Check
16 - 90 = - 74
Not a solution.
16 - 90 = - 74
Not a solution.
2015-08-31 8:52 am
Substituting with x = 4 and y = -18 in the equation i we get resultant equal to 1 , then we can say( 4 , -18 ) is a solution , not otherwise,
4 ( 4 ) + 5 ( -18 ) = 16- 90 = -74 , so -74 is not equal to 1 and therefore ( 4 , -18 ) is not a solution of 4x +5y = 1
4 ( 4 ) + 5 ( -18 ) = 16- 90 = -74 , so -74 is not equal to 1 and therefore ( 4 , -18 ) is not a solution of 4x +5y = 1
2015-08-31 8:43 am
When x = 4 and y = -18 :
L.H.S.
= 4(4) + 5(-18)
= -74
R.H.S. = 1
L.H.S. ≠ R.H.S.
Thus, (4, -18) is NOT a solution of 4x + 5y = 1
L.H.S.
= 4(4) + 5(-18)
= -74
R.H.S. = 1
L.H.S. ≠ R.H.S.
Thus, (4, -18) is NOT a solution of 4x + 5y = 1
2015-08-31 8:41 am
No
4(4) +5(-18) = 16 - 90 = -74
It does not equal 1
(4,-3) is a solution
4(4) +5(-18) = 16 - 90 = -74
It does not equal 1
(4,-3) is a solution
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