5x + 4y. and x - 12y = 20. find x and y by substituting method
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Answer:
x = 5
y = -5/4
Step-by-step explanation:
5x + 4y = 20
x - 12 y = 20
comparing both
5x + 4y = x -12y
=> 4x = -16y
=> x = -4y
now substituting value of x in
x - 12y = 20
-4y -12y = 20
=> -16y = 20
=> -4y = 5
=> 4y = -5
=> y = - 5/4
x = -4y = 5
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