Write three different equations that are equivalent to the equation given below. Then solve one of the equivalent equations. Be sure that you show your work clearly and/or explain how you can be sure that each of your equations is equivalent. 0.25x+0.5x=0.75

Data from 2005 for various age groups show that for each $100 increase in the median weekly income for whites, the median weekly income of blacks increases by $105. also, for workers of ages 25 to 54 the median weekly income for whites was $676 and for blacks was $527. (a) let w represent the median weekly income for whites and b the median weekly income for blacks, and write the equation of the line that gives b as a linear function of w. b = (b) when the median weekly income for whites is $760, what does the equation in (a) predict for the median weekly income for blacks?