Respuesta :

Sephora04
5.
First, cross multiply the original fractions. You'll get:
2.5d=(2·35)
 
To isolate the variable d, divide both sides by it's coefficient, 2.5: 
2.5d/2.5=70/2.5

The result is d. The value of d is 28.
d=28

6.
3.5(36)= 18z

126= 18z

7= z

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