Solve It!
x + 7 = 15
x = 8
Write an equation: “Five more than a number is 12.”
x+5=12
Mia has 3 more than twice the apples as Leo. Mia has 11 apples. How many does Leo have?
2x+3=11, so x=4x = 4x=4
Which is the independent variable: hours studied or test score?
Hours studied
You earn $10/hour. Write an equation for total pay (P) after h hours.
p = 10h
3x = 18
x = 6
Write an equation: "Twice a number is 18."
2x=18
A number minus 5 equals 8. What is the number?
x=13
The cost of apples depends on how many pounds you buy. Which is the dependent variable?
cost
A taxi charges $3 plus $2 per mile. Write a total cost (C) equation.
c = 2m +3
x - 4 = 9
x = 13
Write an equation: "A number divided by 3 equals 7."
x/3 = 7
Dan paid $24 for 6 tokens. How much does each cost?
x=4
You drive for more hours and travel more miles. Which is the independent variable?
hours driven
You read 20 pages each night. Write a total pages (p) equation after d days.
p = 20d
x/5 = 6
x=30
Write an equation: "Nine less than a number is 15."
x-9=15
Three times a number is 42. What is the number?
x=14
amount of earnings
Rent a bike for $5/hour. Write a cost (c) equation for h hours.
c = 5h
4x + 7 =27
x = 5
Write an equation: "Three times a number minus 4 equals 11."
3x-4 = 11
A number divided by 5 and increased by 2 is 7. What is the number?
5/x+2=7, so x=25
The total amount of water used depends on minutes spent showering. What is the independent variable?
Minutes in shower
A tank is filled at 6 gallons/minute. Write an equation for gallons (g) after t minutes.
g = 6t