Answer:
divide each side by 3
Step-by-step explanation:
12÷3=4 and 24÷4= 6 the value of 4b=6
r+b =12
r =2b (twice as many red as blue)
substitute r = 2b into r+b=12
2b + b = 12
3b =12
divide by 3
b=4
r = 2b
r=2(4)
r=8
There are 4 blue pencils and 8 red pencils
Answer:
46.75
Step-by-step explanation:
6+2 1/2 times 5 1/2 = 46.75
Answer:
5
Step-by-step explanation:
7x + 21 = 12x - 4
25 = 5x
5 = x
Answer:20x+50= 5x+70
Step-by-step explanation:
x = number of cavities
use the subtraction property of equality and solve for x
20x+50 = 5x+70
-5x -50 -5x - 50
15x = 20
Then you divide 20 by 15
15x = 20
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15 15
x= 4/3