Answer:
x=4/7
Step-by-step explanation:
You can write 36^4x-1=6^x+2 to 6^2(4x-1)=6^x+2. Then you can write
2(4x-1)=x+2, 8x-2=x+2, 7x=4, x=4/7
4 : 8
x 9 => 36 : 72 <=== equivalent
Graph A proportional graph B not proportional graph C not proportional