I've always found it helpful to take a day out to teach my students how to "clean up" their equations of lines, once they've learned how to "get y by itself." This worksheet "holds their hands" with an example and description of each "pattern" mathematicians use to wrangle the equation of any line into slope-intercept form. For instance, my students often struggle with recognizing that a fraction such as x/2 is the same as one-half x.
Please download the pdf preview file first, so you can see exactly what's included; the product file is a word document, which you may edit for your students.
Keywords: getting y by itself, y=mx+b, slope-intercept form, isolating a variable, equations of lines, Jonnard