Find equation of plane

eqn ---> x/a + y/b + z/c = 1
here , a = 8 , b= 4 ,  c = 9 ( the pic was not clear , if there is mistake in the values plz correct it)
x/8 + y/4 + z/9 = 1 
multiply by 72 ( lcm of 8 4 and 9)
9x + 18 y + 8z = 72
hope it helps