exam Maths Puzzle Numerical Ability

Using transformation - solve each equation:

4/9x = 8

n/2.3 = 5.6

3/5n + 15 = 21

13 - 1/3n = 9

3/4n + 22 = 55

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exam Other Question

Im not really sure what this would be under, but i really need help. The last class i was in, i did not get this question right, and i ended up flunking the class because i cant re Find the unknown in the equation

log3(3^m+1 plus 3^m+2) = log3 972

Im am having trouble getting to the answer which is m = 4

Please note that the 3 in the log 3 972 is small