If ( x + y ) = 10 and ( 2x – 3y ) = 5, find x and y.
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Answered by
2
Answer:
x=7 and
y=3
Step-by-step explanation:
l hope it's helpful for you
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0
Answer:
x = 7
y = 3
Step-by-step explanation:
x + y = 10 ----------> equation ( 1 )
2x - 3y = 5 ------------> equation ( 2 )
multiply equation ( 1 ) * 2:
=> 2 ( x ) + 2 ( y ) = 2 ( 10 )
=> 2x + 2y = 20 ---------> equation ( 3 )
subtract equation ( 3 ) - equation ( 2 ) :
=> 2x + 2y = 20
( - ) 2x - 3y = 5
----------------------------
0 + 5y = 15
---------------------------------
=> 5y = 15
=> y = 15 / 5
=> y = 3
apply y = 3 in equation ( 2 ):
=> 2x - 3 ( 3 ) = 5
=> 2x - 9 = 5
=> 2x = 5 + 9
=> 2x = 14
=> x = 14 / 2
=> x = 7
therefore x = 7 and y = 3
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