losdawg25 wrote:i am a beginner in algebra. i need to solve this. x+15 divided by 5 = x+3 divided by 3
A basic property of
proportions is that, if you "cross-multiply", you'll get the same value on either side. For instance:
. . . . ....can be "proved" by showing that 1(6) equals 3(2). Using this "cross-multiplication" fact to solve looks like this example:
. . . . .. . . . .. . . . .. . . . .In your case, you have:
. . . . ....which "cross-multiplies" as:
. . . . .Multiply things out, and solve the resulting
linear equation for the value of "x".
Eliz.