Subtract 5 from both sides
a/-8 = 4/7 - 5
simplify 4/7 - 5 to 31/-7
a/-8 = 31/-7
multiply both sides by 8
-a = 31/-7 x 8
simplify 31/7 x 8 to 248/7
-a = 248/7
multiply both sides by -1.
The answer is a = 248/7
The words are the explanations of the steps and the dark bolded words are the work shown for each step.
Answer:
The cost of 1 burger is $60 (600 ÷ 10)
The cost of 15 burgers is 900 (15 x 60)
Solving the inequality for g
Move the 6 over by subtraction and you have:
4.5g ≤ 34
Then divide each side by 4.5
g = 7.55555
So Ellis can purchase at lease 7 gallons but not 8 (D)