Jennifer stops at Tim Hortons before work to buy coffee and donuts for her and her co-workers. After buying 5.00 worth of donuts and all her coffees at 1.29 each, her total was 11.45. How many coffees did she purchase?

She purchased 5 coffees

Step-by-step explanation:

$5.00+$1.29c=$11.45

Subtract $5.00 on both sides:

$5.00-$5.00+$1.29c=$11.45-$5.00

$1.29c=$6.45

Divide 1.29 on both sides:

1.29c/1.29=6.45/1.29

c=5 coffees

step-by-step explanation:

for exempl this   system of equations   y = x - 3

                                                                y = 2x - 5

look   the line : y = x -3     ( red)

                            the line : y = 2x -5 ( bleus)