Question

Identify the error Denise made when solving the following system of equations using the substitution method.

Answer 1

At second step

`\\ \tt\hookrightarrow 2x+2(3x+1)=6`

`\\ \tt\hookrightarrow 2x+6x+\boxed{2}=6`

`\\ \tt\hookrightarrow 8x=4`

`\\ \tt\hookrightarrow x=1/2`