4) Solve for x using y = x - 4. x = y + 4 Now plug x in to y = 6x - 10. y = 6(y + 4) - 10 y = 6y + 24 - 10 y = 6y + 14 -5y = 14 y = -14/5 Plug y back in to x = y + 4. x = -14/5 + 4 x = 1.2 (6/5, -14/5)
5) Make the expressions equal to each other. 2x + 3 = 3x - 6 9 = x x = 9
