math
posted by kacey on .
9(x5)=4x5
solve for x.
please help me with this one and show the work so i can understand

divide both sides of equation by 9
x5=4x5
or
4x5=x5
add 5 and x on both sides
4x5x+5=x5x+5
3x=0
divide both sides by 3
3x/3=0/3
x=0 
The instructions were correct, but the execution went awry:
divide both sides by 9
x5 = (4x5)/9 = 4x/9  5/9
add 5  4x/9 to both sides
x  4x/9 = 5  5/9
5x/9 = 40/9
x = 8
final step  check your answer:
x=0 does not work.
9(85) = 27 = 325 
if i may say it would probably be easier and less complicated if you had follow PEMDAS instruction which tells you to take the equation on the left 9(x5) and multiply it out first instead of dividing the two equation by 9. that way you get 9x45=4x5, subtract 4x from both side so you get 5x45=5 and then add 45 to both side to get 9x=40 and then divide by 9 so that you get x on it own to get 40/9 and you messed up the math a little near the endx4x/9 wouldnt have given you 5x/9