Solve the linear equation with any method.

4x-7y=18

9x+14y=40

Cramer's rule seems appropriate for this, since the graph shows fractions with unusual denominators.

x = (-7*40 - 14*18) / (-7*9 - 4*14) = - 532/-119 = 4 8/17

y = (18*9 - 40*4) / - 119 = - 2/119

(x, y) = (76/17, - 2/119)