Class 10MathematicsPair of Linear Equations in Two VariablesMix Examples - Pair of Linear Equations in Two Variables
MediumIf $7x - 9y = 25$ and $9x - 7y = 23$,then $x + y = \dots$
- A$-1$
- B$2$
- C$3$
- D$12$
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Similar Questions
The graph of the pair of equations $3x + 4y = 10$ and $3x + 4y = 15$ represents:
Easy
View SolutionSolve the following pair of linear equations by the method of substitution: $8x + 5y = 9$ and $3x + 2y = 4$.
Medium
View SolutionIf $\frac{5}{x}-\frac{4}{y}=4$ and $\frac{4}{x}-\frac{5}{y}=5,$ then $\frac{1}{x}-\frac{1}{y}=\ldots \ldots \ldots \ldots .(x, y \neq 0)$
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View SolutionFor which values of $a$ and $b$ does the following pair of linear equations have infinitely many solutions?
$x + 2y = 1$
$(a - b)x + (a + b)y = a + b - 2$
$x + 2y = 1$
$(a - b)x + (a + b)y = a + b - 2$
Difficult
View SolutionFor the pair of equations $\frac{2}{x} + \frac{3}{y} = 3$ and $\frac{3}{x} + \frac{2}{y} = 7$,find the value of $\frac{3}{x} + \frac{3}{y}$.
Medium
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