Posted by aneme on Tuesday, February 12, 2008 at 11:22pm.
use the substitution method to solve the linear system.
9x+6y=3
3x7y=26
please show me an example of how to do it.

algebra 1  polo, Tuesday, February 12, 2008 at 11:36pm
what is the slope of the line perpendicular to y= 3x7?

algebra 1  DrBob222, Tuesday, February 12, 2008 at 11:38pm
9x+6y=3
3x7y=26
=============
Solve one equation for one of the variables in terms of the other; for example, solve equation 1 for y.
6y = 39x and
y = (39x)/6 which I would then reduce to
y = (13x)/2
then substitute this y for y in equation 2.
3x 7*[(13x)/2] = 26
3x (7+21x)/2 = 26
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.

algebra 1  aneme, Tuesday, February 12, 2008 at 11:43pm
thanks!:)
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