# algebra 1

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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 -

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

• algebra 1 -

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• algebra 1 -

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 -

thanks!:-)

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