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Question

Can anyone help?  Not sure whether is my methodology is accurate or wrong.  

 

10 years younger

Bertha: 1/4x-10

Ann: x

 

12 years older

Bertha: 1/2x

 

 

 

Answer

Let Bertha’s age be x and Ann’s age be y.

Equation (1): x – 10 = 0.25y

Equation (2): y + 12 = 2x

If we rearrange (2) , we get y = 2x – 12

We then sub (2) into (1), x – 10 = 0.25(2x – 12). 

We get x = 14, y = 16

 

0 Replies 1 Like ✔Accepted Answer

B-10 = 1/4A
A+12 = 2 B

(B-10)x 4 + 12 = 2 B

4B – 40 +12 = 2 B
4B-2B = 40-12
2B = 28
B = 14
A = (14-10)x4 = 16

in my opinion

0 Replies 1 Like
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