Solve the given systems of equations by determinants. All numbers are accurate to at least two significant digits.

In applying Kirchhoff’s laws (see the chapter introduction; the equations can be found in most physics textbooks) to the electric circuit shown in Fig. 5.34, the following equations are found. Find the indicated currents I1 and I 2 (in A).

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521₁ - 271₂ -271₁ + 761₂ -420 = 210