Sophie is 3.5 years younger than her brother. She knows that when she is b years old, her brother is b+3.5 years old. Right now,
Sophie is 11.5 years old.
How old is Sophie's brother?
Write your answer as a whole number or decimal.
2 answers:
Answer:
The answer is 15
Step-by-step explanation:
Lets say b is the age of Sophie, so B would equal 11.5
11.5 + 3.5 = 15 years old.
Answer:
b = 8
Step-by-step explanation:
b + 3.5 = 11.5
Subtract 11.5 from 3.5 to get her brother's age
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Answer:
- To solve the following equation we must first combine like terms
- Recognize the easiest way to manipulate the equation
- Lastly rearrange to isolate for x: usually done with division
2x+3x-11x-6=0
Combine like x variables
-6x-6=0
Add 6 to the right side
-6x = 6
Divide by -6
x=-1
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Answer:
-5a
Step-by-step explanation:
-21 + 16 = 16-21 16-21= -5 Therefore, a=-5
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-6(4x + 1) + 7x + 9(x - 3) = 4
-6(4x) - 6(1) + 7x + 9(x) - 9(3) = 4
-24x - 6 + 7x + 9x - 27 = 4
-24x + 7x + 9x - 6 + 27 = 4
-8x + 21 = 4
- 21 - 21
-8x = -17
-8 -8
x = 2.125
Answer:
t = 1/2
Step-by-step explanation:
4(t+1/4)=3
First, distribute:
4(t)+4(1/4)=3
4t+1=3
Then isolate the variable:
4t+1-1=3-1
4t=2
4t/4=2/4
t=2/4
t=1/2
Answer:
z=-8.7
Step-by-step explanation:
-0.3z=-17.4-2.3z
10(-0.3z)=10(-17.4-2.3z)
-3z=-174-23z
20z=-174
z=-8.7
Check:
-0.3z=-17.4-2.3z
-0.3(-8.7)=-17.4-2.3(-8.7)
2.61=-17.4+20.01
2.61=2.61
