Question

Solve 110 × 213− 12130− 213 × 710 by using appropriate properties.

Answer 1

Step-by-step explanation:

Given -

x

+

y

=

7

----------------(1)

x

−

y

=

−

3

----------------(2)

Solve the first equation for

y

y = 7-x#

Substitute this value in equation(2)

x

−

(

7

−

x

)

=

−

3

x

−

7

+

x

=

−

3

2

x

=

−

3

+

7

2

x

=

4

x

=

4

2

=

2

Substitute

x

=

2

in equation (1)

2

+

y

=

7

y

=

7

−

2

y

=

5