Three friends will go skating at a rink that charges $12 for the afternoon. One friend will also need to rent ice skates for an additional $6. Tyra tried to calculate the total cost for all 3 friends. Her work is shown below

12*3=$36

$36+$6=$42

Step-by-step explanation:

42

Step-by-step explanation:12x3=36      36+6=42

x= -3

step-by-step explanation:

step 1: simplify brackets

4 - x - 1 = 6

step 2: simpilfy

3 - x = 6

step 3: subtract 3 from both sides

-x = 6 - 3

step 4: simpilfy 6 - 3

-x = 3

step 5: multiply both sides by -1

x = -3

38.5

step-by-step explanation:

lets say, first number = r

second number = 3r+7

total = 49

(r)+(3r+7)= 49

4r+7 = 49

4r = 42

r = 42/4

r= 10.5

3r+7 = 3(10.5)+7 = 38.5

hope this