Answer: A. [tex]11x=55[/tex]
Step-by-step explanation:
The given system of equations:
[tex]y = 3x.....................(1)\\\2x + 3y = 55.................(2)[/tex]
When we substitute the value of y in equation (2), we get
[tex]2x+3(3x)=55\\\\\Rightarrow\ 2x+9x=55\\\\\Rightarrow\ 11x=55[/tex]
Hence, the result of using the first equation to substitute for y in the second equation, then combining like terms is [tex]11x=55[/tex]
