If 8^x × 4^y = 32 and 81^x/27^y = 3; find the values of x and y.
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Answered by
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Step-by-step explanation:
8^x . 4^y = 32
2^3x . 2^2y = 2^5
2^(3x+2y) = 2^5
3x+2y = 5 .......eq.(1)
81^x/27^y = 3
3^4x / 3^3y = 3^1
3^(4x-3y) = 3^1
4x-3y = 1 ........eq.(2)
eq.(1) and (2).
3x+2y = 5 .......eq.(1)
4x-3y = 1 ........eq.(2)
from eq. (2)
x = (3y+1)/4
3(3y+1)/4 + 2y = 5
9y+3+8y = 20
17y = 17
y = 1
x = {3(1)+1}/4 = 1
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