Question

If you were to solve the following system by substitution, what would be the best variable to solve for and from what equation? 3x+6y=9 2x-10y=13 a)x in first equation b)x in second equation << i think its this just making sure c)y in first equation d)y in second equation

Answer 1

the answer is x, in the first equation.

Answer 2

I think the correct answer is a)x in first equation

Look at the first equation:
3x + 6y = 9
You can divide both sides by 3 to get:
x + 2y = 3
And then solve it for x:
x = 3 - 2y
Now you can substitute x to 3-2y in the second equation
Next you will solve the second equation for y