Posted by **aneme** on Tuesday, February 12, 2008 at 11:22pm.

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.

- algebra 1 -
**polo**, Tuesday, February 12, 2008 at 11:36pm
what is the slope of the line perpendicular to y= 3x-7?

- algebra 1 -
**DrBob222**, Tuesday, February 12, 2008 at 11:38pm
9x+6y=3

3x-7y=-26

=============

Solve one equation for one of the variables in terms of the other; for example, solve equation 1 for y.

**6y = 3-9x and
**

y = (3-9x)/6 which I would then reduce to

y = (1-3x)/2

then substitute this y for y in equation 2.

**3x -7*[(1-3x)/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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