Question

x+y =7
10y +x+3=4(10x+y) ​

Answer 1

Answer:

x=1 and y= 6

Step-by-step explanation:

x+y=7

therefore

x=7-y

10y+x+3=4(10x+y)

10y+x+3=40x+4y

10y-4y+3=40x-x

6y+3=39x

Substituting the value of x,

6y+3=39(7-y)

6y+3=273-39y

6y+39y=273-3

45y=270

y=270/45

y=6

Substituting the value of y,

x=7-y

x=7-6

x=1

Please mark it as brainliest. Thank you.