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Which of these shows the result of using the first equation to substitute for y in the second equation, then combining like terms?
y = 3x
2x + 3y = 55

A. 11x = 55
B. 5x = 55
C. 9x = 55
D. 5y = 55

Respuesta :

11x=55 just took the test

JeanaShupp

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]

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