Solve the following by using cross multiplication method x/5 + y/15 = 1/3 x/3 + y/5 = 1/5
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Answer:
x =3
y = -4
Step-by-step explanation:
x/5 + y/15 = 1/3
x/3 + y/5 = 1/5
x/5 + y/15 = 1/3
( multiplying both sides by 15)
=> 3x + y = 5 - eq 1
x/3 + y/5 = 1/5
( multiplying both sides by 15)
=> 5x + 3y = 3 - Eq 2
Eq 2 - Eq 1
2x + 2y = -2
=> x + y = -1
=> y = -1 - x
putting this value in Eq 2
3x -1 -x = 5
=> 2x = 6
=> x = 3
y = -1 - 3
y = -4
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