Question

7x + 2y = 4

y = x + 1
Solve the system of equations.
A. (1/3, 4/3)
B. (2/9,11/9)
C. no solution

Answer 1

It’s B.

y=x+1

7x+2(x+1)=4

y=x+1
9x+2=4

Subtract 4-2 from the second equation.

The we have y=x+1

9x=2

x=2/9

Then plug in x into the other equation bc now we know it!

y=2/9+1

Which is 11/9

I hope this helps!!!

Answer 2

`7x + 2(x + 1) = 4 \\ 7x + 2x + 2 = 4 \\ 9x + 2 = 4 \\ 9x = 2 \\ x = (2)/(9) \\ \\ y = (2)/(9) + 1 = (11)/(9) \\ ( (2)/(9) \: (11)/(9) )`