irenituh irenituh

10-03-2021
Mathematics

contestada

10(1+3d)=-20
step by step pls

Respuesta :

joleeann3 joleeann3

10-03-2021

Answer:

d=-1

Step-by-step explanation:

10(1+3d)= -20

divide both sides by 10

1+3d=-2

move the costant to the right, change the sign

3d=-2-1

caclulate

3d=-3

divide both sides by 3

d=-1

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