8x+9y=-1 x=6-2ySolve the system by using the substitution method.

Given the equations:

8x+9y =
-1...........(1)

x = 6 - 2y
...............(2)

we need solve for x and
y.

We will use the substitution method to
solve.

We will substitute (2) into
(1).

==> 8x+9y =
-1

==> 8(6-2y) + 9y =
-1

==> 48 - 16y + 9y =
-1

==> -7y = -49

Now we
will divide by -7

==> y= -49/-7 =
7

==> y= 7

==> x
= 6-2y = 6-2(7) = 6 -14 = -8

Then the solution for the
system is:

x = -8  and  y=
7