The equations in question 1 all have the same coefficients for either $$x$$ or $$y$$. One of these variables can be eliminated by simply adding or subtracting the equations. Solve the following equations:

Question 1

 (a) $$2x + y = 10$$ (b) $$x + 8y = 55$$ (c) $$3x - 4y = 4$$ (d) $$7x - 3y = 66$$ $$2x + 4y = 22$$ $$x - 3y = -11$$ $$2x + 4y = 36$$ $$2x - 3y = 21$$ (e) $$7x - 6y = 10$$ (f) $$5x + 2y = 29$$ (g) $$4x + 2y = -2$$ (h) $$6x - 4y = -13$$ $$4x - 6y = -2$$ $$3x - 2y = 11$$ $$7x + 2y = 4$$ $$6x + 2y = 11$$ (i) $$3x + 5y = 41$$ (j) $$12x +12y = -3$$ (k) $$5x + 8y = 51$$ (l) $$8x + 4y = 3$$ $$x + 5y = 37$$ $$2x -12y = -4$$ $$2x - 8y = -30$$ $$8x + 6y = 2$$