Leysa {l}{2x+4y=9}{4x^2+16y^2=28x}{z=4y-19}{a=z}{b=a}{text{Solvefor}ctext{where}}{c=b}

$$\left. \begin{array} { l } { 2 x + 4 y = 9 }\\ { 4 x ^ {2} + 16 y ^ {2} = 28 x }\\ { z = 4 y - 19 }\\ { a = z }\\ { b = a }\\ { \text{Solve for } c \text{ where} } \\ { c = b } \end{array} \right.$$

Leystu fyrir x, y, z, a, b, c

$$x=\frac{\sqrt{94}}{4}+4\approx 6.423839929\text{, }y=-\frac{\sqrt{94}}{8}+\frac{1}{4}\approx -0.961919964\text{, }z=-\frac{\sqrt{94}}{2}-18\approx -22.847679857\text{, }a=-\frac{\sqrt{94}}{2}-18\approx -22.847679857\text{, }b=-\frac{\sqrt{94}}{2}-18\approx -22.847679857\text{, }c=-\frac{\sqrt{94}}{2}-18\approx -22.847679857$$

$$x=-\frac{\sqrt{94}}{4}+4\approx 1.576160071\text{, }y=\frac{\sqrt{94}}{8}+\frac{1}{4}\approx 1.461919964\text{, }z=\frac{\sqrt{94}}{2}-18\approx -13.152320143\text{, }a=\frac{\sqrt{94}}{2}-18\approx -13.152320143\text{, }b=\frac{\sqrt{94}}{2}-18\approx -13.152320143\text{, }c=\frac{\sqrt{94}}{2}-18\approx -13.152320143$$