Question

a-b=3 and a+b=7 then find the value of b

Answer 1

$<b> <u> <i> Heya! </b> </u> </i>$

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→ Given Equations :

$<b> a - b = 3 ...............[1. ] </b>$

$<b> a + b = 7 ...............[2. ] </b>$

Solving equation [1.] and [2.] by $<b> Elimination Method. </b>$,

=> Add the two equations ,

→ a + a + b - b = 10

→ 2a = 10

•°• $<b><u> a = 5 </b> </u>$

=> Put the value of a in Equation 1.

→ a - b = 3

→ 5 - b = 3

→ -b = 3 - 5

•°• $<b><u> b= 2 </u> </b>$

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Answer 2

a - b = 3

a + b = 7

Adding ,

2a = 10

a = 10/2

= a = 5

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& b = 5 -3

b = 2

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