Mister Exam
x3x+2y=8; 6x-7y=5
The solution
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x3*x + 2*y = 8
$$x x_{3} + 2 y = 8$$
6*x - 7*y = 5
$$6 x - 7 y = 5$$
6*x - 7*y = 5
Rapid solution
$$x_{1} = \frac{7 y + 5}{6}$$
=
$$\frac{7 y}{6} + \frac{5}{6}$$
=
$$x_{31} = - \frac{12 \left(y - 4\right)}{7 y + 5}$$
=
$$\frac{12 \left(4 - y\right)}{7 y + 5}$$
=
=
$$\frac{7 y}{6} + \frac{5}{6}$$
=
0.833333333333333 + 1.16666666666667*y
$$x_{31} = - \frac{12 \left(y - 4\right)}{7 y + 5}$$
=
$$\frac{12 \left(4 - y\right)}{7 y + 5}$$
=
-12*(-4 + y)/(5 + 7*y)