Answer:
B
Step-by-step explanation:
log4x = 2.1
logx/log4 = 2.1
logx = log(4) x 2.1
logx = 1.264
x = 10^(1.264)
x = 18.38 (to two d.p)
It a simultaneous equation so the solution is 2
9
9y=27
divide by 9 each side
9y/9y=27/9
y=3