Question

x+y=4 2x+3y=18 by elimination method

Answer 1

Answer:

x+y=4------------egn1

2x+3y=18--------egn2

egn1*2

2x+2y=8

2x+3y=18

subtracting them

-y=10

y=-10

now putting the value of y in egn 1

x+(-10)=18

x=28

Answer 2

Answer:

x+y=4 eq..............1

2x+3y=18eq..........2

x=4-y

put the eq..........2

2(4-y)+3y=18

8-2y+3y=18

8-5y=18

5y=18-8

5y=10

y=2

put the value in eq......... 1

x+2=4

x=4/2

x=2