Pair of Linear Equations in Two Variables
Your child will turn everyday puzzles about prices, ages and mixtures into pairs of equations and solve them with total confidence. This chapter commonly carries about six marks in the board paper, frequently through one three-mark word problem plus short questions on graphs or methods. Learners first picture each equation as a straight line, reading intersecting lines as one solution, parallel lines as none and coincident lines as infinitely many. Then they master three solution methods, namely substitution, elimination and cross-multiplication, checking every answer back in the original stor
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