1.) solve x - 9 = -12
-) solve 2t + 7 = -1

1)x=3

2)t=-4

Step-by-step explanation:

x-9=-12

x=3

2t=-8

t=-4

x=-3;  t=-4

Step-by-step explanation:

1) x - 9 = -12

x=-12+9

x=-3

2.

2t + 7 = -1​

2t=-1-7

2t=-8

t=-4

$8

step-by-step explanation:

it is pretty much backwards.

you take the 4x2 multiply that, and that is = $8

to determine the unit cost your would divide the total cost by the number sold.

7 bagels for $4.41       $4.41/7 = $.63 each at fresh side

5 bagels for $3.60         $3.60/5 = $.72 each at value mart