Question

find the solutions sets of the following system of equations. 1) a+b=15. a-b=5​

Answer 1

Answer:

a=10

b=5

Step-by-step explanation:

a+b=15

a=15-b

so.

a-b=5

15-b-b=5

-2b=5-15

b=-10/-2

b=5

a+b=15

a=15-b

a=15-5 b=5

a=10

Answer 2

Given :-

a + b = 15

a - b = 5

To Find :-

values of a and b

Explanation :-

a + b = 15 ( 1 )

a - b = 5   ( 2 )

subtracting eqn ( 2 ) from ( 1 )

         a + b = 15

         a  - b  = 5

( - )    -     +      -                                      

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         0  + 2b = 10

⇒ 2b = 10

⇒ b = $\frac{10}{2}$

b = 5

put value of b in any one equation,

⇒ a + b = 15

⇒ a + 5 = 15

⇒ a = 15 - 5

a = 10

∴ a = 10 and b = 5

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Hope It Helps You

By Abhiram5566

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