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8M: 2-3 QC (solving 2-step equations)
供稿人: Maynard
(原作者: Bennett)
1.  Solve the equation below. 
10
r
+ 4 = 5
*Just write the
number for the
answer.
2.  Solve the equation below.
-10 - 6x = 110
*Just write the
number for the
answer.
3.  Solve the equation below.
3p - 2 = -29
*Just write the
number for the
answer.
4.  Solve the equation below.
1 - r = -5
*Just write the
number for the
answer.
5.  Solve the equation below.
-9 +
n
4
= -7
*Just write the
number for the
answer.
6.  Solve the equation below.
4 + 2.2h = -3.7
*Just write the
number for the
answer.
7.  Solve the equation below.
-5g + 2.3 = -18.8
*Just write the
number for the
answer.
8. Solve the equation below.
-6t - 7 = 17
*Just write the
number for the
answer.
9. Polly purchased softball equipment and uniforms 
    for a total cost of $1,836.  The equipment cost $612,
    and the uniforms cost $25.50 each. Which equation 
    could be used to find out how many uniforms the 
    school purchased?
x/1836 = 612(25.50)
1836 = 612x + 25.50
1836 = 612 + 25.50x
1836/25.50 + x = 612
10. The USDA (U.S. Department of Agriculture)       recommends 2,500 calories per day for teenage      boys. If you double the number of calories per       day that the USDA recommends for young children,      and then subtract 100, you get the number of      calories per day recommended for teenage boys.        Which equation could be used to calculate the       number of calories per day recommended for       young children?
2500 = 100 - 2x
2500 = 2x -100
-100 = 2500 + 2x
11.  Ms. Morris joined a local gym.  They charged       her a $50 sign-up fee plus $45 per month.  If       she paid a total of $455, how many months, m,        was she a member at the gym?  Which equation       represents this situation?
50 + 45m = 455
50m + 45 = 455
50 - 45m = 455
455 + 45m = 50
12.  Ms. Morris joined a local gym.  They charged       her a $50 sign-up fee plus $45 per month.  If       she paid a total of $455, how many months, m,        was she a member at the gym?  
months
13.  Write an equation for the given words.
7 less than 15 times a number is 80.
7 - 15n = 80
7 - 15 + n = 80
15n - 7 = 80
7(15 - n) = 80
14.  Write an equation for the sentence below.
The sum of three times a number and 16is the same as 54.  
3n - 16 = 54
3n + 16 = 54
3n = 16 + 54
3(n + 16) = 54
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