The best method would be to cross-multiply. Multiply the figure on the top left with the bottom right. Then set it equal to the multiplication of the bottom left with the top right. This would turn into: -1(x-1)=2(x+3) Then distribute the multiplication through the parentheses. -x+1=2x+6 Next, get all the variables on one side, and the integers on another. 2x+x=1-6 3x= -5 x= -5/3
