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100
c+23=48 for c=35
c+23=48 35+23=48 58 does not equal 48 35 is not a solution
100
Evaluate the expression, 2x-9 for x=5
1
100
Write an equivalent expression for 8(3x+7)
24x+56
100
3x=12
3x=12 /3 /3 x=4 3x=12 3(4)=12 12=12
100
2x+6=22
x=8
200
85=194-a for a=105
85=194-a 85=194-105 85 does not equal 89 105 is not a solution
200
Evaluate w+10∙3 for w=8
38
200
Write an equivalent expression for 6(4x+5)
24x+30
200
27=15+y
27=15+y -15 -15 12=y 27=15+y 27=15+12 27=27
200
7x-11=38
x=7
300
49/r=7 for r=7 49 divided by r=7 for r=7
49/r=7 49/7=7 7=7 7 is a solution
300
The Peregrine falcon is the fastest bird. The fastest recorded flight for a peregrine falcon is 242 mph. How much faster is a peregrine falcon than a Canadian goose? Let g represent the speed of a Canadian goose.
242-g
300
Write an equivalent expression for 8x+12y
2(4x+6y) or 4(2x+3y)
300
14=c/5
14=c/5 *5 *5 c=70 14=c/5 14=70/5 14=14
300
x/3+4=15
x=33
400
12y=84 for y=7
12y=84 12(7)=84 84=84 7 is a solution
400
Evaluate the expression, 12+4x-(3-2+6) for x=9
41
400
Write an equivalent expression for 4x+8
2(x+4) or 4(x+2)
400
You can estimate the distance of a thunderstorm in kilometers by counting the number of seconds between the lightning flash and the thunder and then dividing this number by 3. If a storm is 2 km away, how many seconds will you count between the lightning flash and the thunder? Write a division equation and then solve.
n/3= n=6 seconds between the flash and thunder
400
(x+12)/4=8
x=20
500
112=14y for y=8
112=14y 112=14(8) 112=112 8 is a solution
500
Evaluate the expression for a = 3, b = 4, c = 7, and d = 0. 10(a − d) + b(c)
10(3-0) + 4(7) 58
500
Write an equivalent expression for 4x-8y+16
2(2x-4y+8) or 4(x-2y+4)
500
170r=34000
170r=34000 /170 /170 r=200 17r=272 170(200)=34000 34000=34000
500
Zach's plant is 12 cm tall. If the plant continues to grow 3 centimeters each week, after how many weeks will the plant be 33 centimeters tall? Write and solve a 2-step equation. Hint: #p+#=33
3x+12=33 x=7 weeks