Question

2x + y = 7

y = x + 1

When the expression x+1 is substituted in for y in the first equation, the result is

2x + 1 = 7
x + 1 = 7
3x + 1 = 7

Answer 1

Answer: 3x + 1 = 7

Step-by-step explanation:

2x + y = 7

substitute x + 1 for y

2x + (x + 1) = 7

2x + x + 1 = 7

3x + 1 = 7