Question

2x+5y=13 and 3x+7y=18
substitution method​

Answer 1

Answer:

X = 3/2 and y= 2

Step-by-step explanation:

2x+5y=13

2x=13-5y

X= 13-5y _____ (i)

2

3x+7y=18

3x=18-7y

X=18-7y _______(ii)

3

(i) and (ii) equation

13-5y = 18-7y

2. 3

3(13-5y) = 2(18-7y)

38-15y = 36-14y

38-36 = -14y+15y

2 = y

when y= 2 put this value in any above equation

2x+5(2)=13. put y = 2

2x+10=13

2x = 13-10

X= 3/2

hence; X= 3/2 and y = 2