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Ans it mental ability

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Answer:

5t= 4e

12E =9d

6d =8s

25t+ 20e+ 18d+ 12s = 1330

1) rearrange the first three equations for e

5t = 4e

t=4e/5

12e = 9d

d= 12e/9 4e/3

6d = 8s

6(4e/3) =8s

8e =8s

e =s

2) plug into eq4and solve for e

25 (4e/5) + 20e + 18(4e/3) + 12e =1330

20e + 20e +24e + 12e = 1330

76e = 1330

e = 17.5

3) solve for the other variables

s = 17.5

d = 4 ( 17.5)/3 =70/3

t =4(17.5) /5=14

4) CHECK your answers

25(14)+ 20(17.5)+ 18(70/3) + 12(17.5) =,1330

350 + 350+420+210 = 1330



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