Answer:
a) 6x + 18 = 84
b) 11 yards
Step-by-step explanation:
a) You have that Jennifer made 6 identical curtains. If you chose x as the number of yards of fabric used for one curtain, you have that the total number of yards in the 6 curtains o fabric is
[tex]6x[/tex]
Furthermore, if you sum 18 yards to the 6x yards, the total amount of yards must be 84. Thus, you have the following equation:
[tex]6x+18=84[/tex]
b) Next, you solve the equation for x:
[tex]6x+18=84\\\\6x=84-18\\\\6x=66\\\\x=\frac{66}{6}=11[/tex]
Then, 11 yards were use to make each curtain.