Answer:
Enjoy and it would be good if you gave more points
Step-by-step explanation:
We substitute the given into the equation
given: a=-1, b=2, c=

=(

-1
=

-1
=

-1
=

-1
to continue, we can either find a common denominator or change the fraction to decimal.
Fraction to Decimal:

=-2.5
Equation=-2.5-1=-3.5
OR Common Denominator:
=


×

(denominator should be -2=common)
=

+

=

which also = to -3.5
Answer:
2s+2p = 42,
3s+p = 37,
2 shirts at 8 = 16,
2 pants at 13 = 26.
Hope this helps.
Step-by-step explanation:
you can estimate 57.8 and 81 then to check you can do 57.8 divided by 81