4^(x+3)=112+8×4^x answer
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Let 4ˣ = y
then
4³ y = 112 + 8y
64y-8y = 112
56y =112
y = 2
putting the value of y
4ˣ = 2
2²ˣ = 2¹
2x = 1
x= 1/2
now we have to find (18x)³ˣ
=(18 x 1/2)³/₂
=9³/₂
=(9¹/₂)³
=3³
=27
then
4³ y = 112 + 8y
64y-8y = 112
56y =112
y = 2
putting the value of y
4ˣ = 2
2²ˣ = 2¹
2x = 1
x= 1/2
now we have to find (18x)³ˣ
=(18 x 1/2)³/₂
=9³/₂
=(9¹/₂)³
=3³
=27
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