Question

solve graphically x+y=4 and 3x-2y=7

Answer 1

Answer:

x+y=4

x=4-y

3x-2y=7

=3(4-y)-2y=7

=12-3y-2y=7

= -3y-2y=7-12

= -5y= --5

=y= -5/-5

=y=1

=x=4-1

=x=3

Answer 2

Answer:

3=x

y=1

so

x+y=4

3+1=4

3x-2y=7

(3×3)-(2×1)=7

(9)-(2)=7

9-2=7

proved