Question

the pair of linear equations 2x + 3y - 7 and (
m m) x + (297 - ) y - 21 have infinitely
many solutions, then the value of 't' and 'n are
A] - 1 -5 BJ -5,4-1 m-- 1. 5 D -5, -1​

Answer 1

Answer:

In △ABC AB=AC

⇒∠B=∠C (Angles opposite to equal sides are equal)

Now using angle sum property

∠A+∠B+∠C=180

∘

⇒80

∘

+∠C+∠C=180

∘

⇒2∠C=180

∘

−80

∘

⇒∠C=

2

100

∘

=50

∘

now ∠C+∠x=180

∘

(Angles made on straight line (AC) are supplementary)

⇒50

∘

+∠x=180

∘

⇒∠x=180

∘

−50

∘

=130

∘

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