2(y−4)leftarrow18

Question
Algebra foundations
$$\displaystyle{2}{\left({y}−{4}\right)}\leftarrow{18}$$

2020-12-06
We are given:
$$\displaystyle{2}{\left({y}-{4}\right)}\leftarrow{18}$$
Divide both sides by 2:
$$\displaystyle{\frac{{{2}{\left({y}-{4}\right)}}}{{{2}}}}\leftarrow{\frac{{{18}}}{{{2}}}}$$
$$\displaystyle{y}-{4}\leftarrow{9}$$
$$\displaystyle{y}-{4}+{4}\leftarrow{9}+{4}$$
$$\displaystyle{y}\leftarrow{5}$$

Relevant Questions

Airlines schedule about 5.5 hours of flying time for an A320 Airbus to fly from Dulles International Airport near Washington, D.C., to Los Angeles International Airport. Airlines schedule about 4.5 hours of flying time for the reverse direction. The distance between these airports is about 2,300 miles. They allow about 0.4 hour for takeoff and landing.
a. From this information, estimate (to the nearest 5 mph) the average wind speed the airlines assume in making their schedule.
b. What average airplane speed (to the nearest 5 mph) do the airlines assume in making their schedule?
Which of these are propositions? What are the truth values of those that are propositions? a) Do not pass go. b) What time is it? c) There are no black flies in Maine. d) 4 + x = 5. e) The moon is made of green cheese. f) $$\displaystyle{2}≥{100}$$. g) Kochi is the capital of Kerala state. h) 2 + 3 = 5. i) 5 + 7 = 10. j) Answer this question.
At top speed, a coyote can run at a speed of 44 miles per hour. If a coyote could maintain its top speed, how far could it run in 15 minutes?
(A) 2.93 miles
(B) 11 miles
C 176 miles
(D) 660 miles :
Express $$\displaystyle{2}×{10}^{{−{4}}}$$ in standard notation
Determine whether each equation represents a proportional relationship. If it does, identify the constant of proportionality. $$\displaystyle{a}.{y}={0.5}{x}-{2}$$
$$\displaystyle{b}.{y}={1},{000}{x}$$
$$\displaystyle{c}.{y}={x}+{1}$$
$$\displaystyle{2}+{4}^{{{2}}}{\left({5}-{3}\right)}$$
Which expression can be used to check the quotient $$\displaystyle{646}÷{3}?$$
$$\displaystyle{A}{\left({251}×{3}\right)}+{1}$$
$$\displaystyle{B}{\left({215}×{3}\right)}+{2}$$
$$\displaystyle{C}{\left({215}×{3}\right)}+{1}$$
$$\displaystyle{D}{646}×{3}$$
A computer repair technician charges $50 per visit plus$30/h for house calls.