Linear Equations in One Variable Flashcards
7 cards from real Bluebook SAT Test practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Linear Equations in One Variable flashcards as text
If 3x − 7 = 14, what is the value of x?
Answer: 7
Add 7 to both sides: 3x = 21; divide by 3: x = 7.
A store sells notebooks for $4 each. Maya buys several notebooks and pays $28 total. How many notebooks did she buy?
Answer: 7
4n = 28 → n = 7.
Solve for x: 5(x + 2) = 35
Answer: x = 5
Divide both sides by 5: x + 2 = 7; subtract 2: x = 5.
If 2x + 9 = 4x − 3, what is the value of x?
Answer: x = 6
Subtract 2x: 9 = 2x − 3; add 3: 12 = 2x; x = 6.
A plumber charges a $45 flat fee plus $30 per hour. A customer's bill was $165. How many hours did the plumber work?
Answer: 4 hours
45 + 30h = 165 → 30h = 120 → h = 4.
Solve for x: (x/4) − 3 = 2
Answer: x = 20
Add 3: x/4 = 5; multiply by 4: x = 20.
If −2x + 5 = 13, what is the value of x?
Answer: x = −4
Subtract 5: −2x = 8; divide by −2: x = −4.