Log3 3-x + log4-x= 1+2 log3 2
log3 3-x + log3 4-x= 1+2 log3 2
log3 3-x + log3 4-x= log3 3+ log3 4
(3-x)(4-x)=12
x^2-7x+12-12=0
x^2-7x=0
x(x-7)=0
x=0
x-7=0
x=7
