Simultaneous equations like đť’š = 2đť’™ - 1 and đť’š = đť’™ + 1 can be represented graphically. To solve the equations graphically, the two lines đť’š = đť’™ + 1 and đť’š = 2đť’™ - 1 are drawn on the same diagram.
Given any cubic or quartic equation with real coefficients, it can be transformed by a change of variable into a standard form, and thus solved by means of a double-sided scale (Fig. 1) in the case of ...
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