Twelve increased by twice a number is 28. What is the number?
7
100
4 x (-6 + 3)
-12
200
-2x + 10 = -4
7
200
n - 6 = 2n - 14
8
200
5(x - 4) = 10
6
200
Hugo received $100 for his birthday. He then saved $20 per week until he had a total of $460 to buy a printer. For how many weeks did Hugo save his money?
18 weeks
200
(4 - 7) + (-12)
-15
300
-2 - 3x = 1
-1
300
5m - 3 = 2m - 9
-2
300
3x + 4(x - 2) = 6 + x
7/3
300
If Daphne subtracts five times her number from 24, she gets 4. What is Daphne’s number?
4
300
(-4)(-5) + (-3)
-23
400
-27 = -6 - m/3
63
400
5x + 2 - 2x = 7x + 5
-3/4
400
5m - 3(m - 3) = 2(m + 3)
9 = 6 This is never true -- no solutions!
400
Ruby’s grandfather gives Ruby $5 and then 50¢ for each math question she answers correctly on her math exams for the year. If Ruby answered all 12 problems correctly on her first exam, how much money has she earned so far?
$11.00
400
Simplify: -(5 - x)
-5 + x
500
17 + 3n = 3(n + 5)
No Solution (17 never equals 15).
500
5(b - 2) = 3b
5
500
-3(2a - 4) = -12a + 30
3
500
Three times the sum of 4 and a number is 8 less than twice the number. What is the number?