I recommend solving the second equation above for y. That will be y=4x-4. Now sub that value of y into the first equation for y and get 2x+2(4x-4)=1. Expand to get 2x + 8x - 8 = 1. Combine like terms and we get 10x = 9 and [tex]x= \frac{9}{10} [/tex]. Now we need to plug that x value into any equation we have to solve for y (your "b"). [tex]2( \frac{9}{10})+2y=1 [/tex] and [tex] \frac{9}{5}+2y=1 [/tex]. Then [tex]2y= \frac{5}{5}- \frac{9}{5} = \frac{-4}{5} [/tex]. Multiplying both sides by 1/2 gives us that y = -2/5. That's your "b" value you're looking for.
