If x = 1 and y = 2 is a solution of the pair of linear equations 2x - 3y + a = 0 and 2x + 3y - b = 0, then:... | MCQ 1m | Maths | SuperPadhai

Linear Equations > Question

MCQ1 markYear: 2025EasyCBSE Class 10

linear-equationssolution-of-pair

Question

If

x = 1

and

y = 2

is a solution of the pair of linear equations

2 x - 3 y + a = 0

and

2 x + 3 y - b = 0

, then:

Solution

1

Substituting

x = 1

,

y = 2

:

2 (1) - 3 (2) + a = 0 \Rightarrow a = 4

and

2 (1) + 3 (2) - b = 0 \Rightarrow b = 8

. So

2 a = 8 = b

, i.e.,

2 a = b

.

+1 mark

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