Equations & Systems Level 28: 3-var realistic - find x (no timer). realistic 3-var find x. 1. Coefficient determinant1. Coefficient determinantDUse the coefficient columns.QuestionSource equation systemFade the RHS; read x, y, z in place.Unchanged augmented matrix with the right-hand side faded→coefficient-determinant line 1D = -1440.2. Target determinant2. Target determinantD_{x}Keep every column fixed; apply sign +.coefficient-determinant settledFade x; read y, z, RHS in place.Unchanged augmented matrix with x faded and the divider after its column→target-determinant line 1target-determinant line 2Dx = -36000.3. Read3. ReadxUse the settled ratio.coefficient-determinant settledtarget-determinant settledtarget-ratio line 1x = 25.