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January 30, 2015

January 30, 2015

Posted by **cbse 8th** on Friday, July 11, 2014 at 10:20am.

- maths -
**Steve**, Friday, July 11, 2014 at 11:10amlook at what we have:

a+b+c+d = 66.5

b = a-2

c = a+1.5

d = c+1.5

Start substituting:

a+(a-2)+(a+1.5)+((a+1.5)+1.5) = 66.5

a=16.0

b=14.0

c=17.5

d=19.0

- maths -
**Reiny**, Friday, July 11, 2014 at 11:13amb = a-2

c = a+1.5

d = c+1.5 = a+1.5 + 1.5 = a+3

a+b+c+d = 66.5

a + a-2 + a+1.5 + a+3 = 66.5

4a = 64

a= 16

box A = 16

box B = 14

box C = 17.5

box D = 19

check:

sum = 66.5

All is good.

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