1. Let L be the number of t-shirts Lily has.
Equation: L = 4 * 33 - 3
Solution: L = 132 - 3 = 129
Lily has 129 t-shirts.
2. Let x be the number.
Equation: 4x = 2x + 8
Subtract 2x from both sides: 2x = 8
Divide by 2: x = 4
The number is 4.
3. Let c be the cousin's age.
Equation: 30 = 2c + 8
Subtract 8 from both sides: 22 = 2c
Divide by 2: c = 11
The cousin is 11 years old.
4. Let h be the number of hours.
Equation: 125 + 30h = 305
Subtract 125 from both sides: 30h = 180
Divide by 30: h = 6
Craig had the rental car for 6 hours.
5. Let n be the number.
Equation: 2n + 10 = 24
Subtract 10 from both sides: 2n = 14
Divide by 2: n = 7
The number is 7.
6. Let m be the minutes read last week.
Equation: 120 = 2m + 10
Subtract 10 from both sides: 110 = 2m
Divide by 2: m = 55
Kyla read 55 minutes last week.
7. Let the first even number be x, then the next two are x+2 and x+4.
Equation: x + (x+2) + (x+4) = 18
Combine like terms: 3x + 6 = 18
Subtract 6: 3x = 12
Divide by 3: x = 4
The three numbers are 4, 6, and 8.
8. Let a be the weekly allowance.
Equation: a - (a/3) - 8 = 2
Combine terms: (2a/3) - 8 = 2
Add 8 to both sides: 2a/3 = 10
Multiply by 3: 2a = 30
Divide by 2: a = 15
The weekly allowance is $15.
Parent Tip: Review the logic above to help your child master the concept of word problems algebra 1 worksheet.
