Question

use the substitution method to solve the linear system.
9x+6y=3
3x-7y=-26
please show me an example of how to do it.

Answer 1

what is the slope of the line perpendicular to y= 3x-7?

Answer 2

9x+6y=3
3x-7y=-26
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Solve one equation for one of the variables in terms of the other; for example, solve equation 1 for y.
<b>6y = 3-9x and
y = (3-9x)/6 which I would then reduce to
y = (1-3x)/2</b>
then substitute this y for y in equation 2.
<b>3x -7*[(1-3x)/2] = -26
3x -(7+21x)/2 = -26</b>
You see that y has been eliminated. Continue and solve for x, then substitute this value into the other equation and solve for y. Finally, substitute both x and y into one of the equations to make sure those values satisfy the equation. Check my work.

Answer 3

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Answer 4

thanks!:-)