15x + 11y =
132...........(1)
2x + 3y = 59
..................(2)
We will use the substitution method
to solve.
We will rewrite equation (2) and a function of
x.
==> y= (59 - 2x)
/3
Now we will substitute into
(1).
==> 15x + 11 ( 59-2x)/3 =
132
==> 15x + 649/3 - 22/3 x =
132
==> 15x - 22/3 x = 132 -
649/3
==> (45-22)/3 x =
-253/3
==> 23/3 x =
-253/3
==> x = -253/23 =
-11
==> y= (59-2x)/3 = (59+22)/3 = 81/3=
27
==> y=
27
Then the solution to the system is
the pair (-11, 27)
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