Substitution, elimination, cross-multiplication, graphical interpretation.
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Q1 · Pair of Linear Equations in Two Variables · EASY
The pair of equations x + y = 5 and 2x + 2y = 10 has:
Q2 · Pair of Linear Equations in Two Variables · MEDIUM
If 2x + 3y = 12 and x - y = 1, then the value of x is:
Q3 · Pair of Linear Equations in Two Variables · HARD
For what value of k will the system of equations 3x + 4y = 12 and kx + 12y = 30 have no solution?