y=2+5x
____
2+3x
please explain how you work this out. Apparently its A* GCSE maths, but I am inyear 9! PLEASE HELP! Thanks in advance!
2006-12-11 05:06:37 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
sorry, thats y= 2+5X
______
2+3X
transpose it to equal X! thank you!
2006-12-11 05:07:30 · update #1
53#1
2006-12-11 05:08:30 · answer #1 · answered by Anonymous · 0⤊ 0⤋
therefore, we want to express the equation as x = ???
we'll pretend we are solving the equation, and looking x = ?, since we "know" what y is (the value of y is irrelevant in this problem)
y = (2+5x)/(2+3x) /*(2+3x) (to get rid of the ratios)
y(2+3x) = 2+5x
now get rid of the brackets
2y + 3xy = 2 + 5x
put all unknowns on the left
2y + 3xy - 5x = 2 (transfer y on the right)
3xy - 5x = 2 - 2y
extract x
x(3y -5) = 2-2y /: (3y-5)
x = (2-2y)/(3y-5)
2006-12-11 13:32:24 · answer #2 · answered by Mirta G 2 · 0⤊ 0⤋