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What would be the best variable to solve for and from what equation

What would be the best variable to solve for and from what equation-example-1
User Ptamzz
by
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1 Answer

3 votes

Answer

Option C is correct.

x, in the first equation is the best variable to solve for here.

Step-by-step explanation

3x + 6y = 9

2x - 10y = 13

To substitute, we can see that the first equation is perfect with all of the coefficents divisible by 3 and x is the most prime candidate for substitution because once we divide the first equation through by 3, x is the variable that becomes alone and easy to solve for.

3x + 6y = 9

Divide through by 3

x + 2y = 3

x = 3 - 2y (Solved for!)

We can then substitute this into the second equation to solve the entire system of equations for x and y.

Hope this Helps!!!

User Jong
by
8.0k points

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