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Can someone help me do this problem and explain it to me step by step? If so I’ll mark you brainliest

Can Someone Help Me Do This Problem And Explain It To Me Step By Step If So Ill Mark You Brainliest class=

Sagot :

maniknandini

Answer:

-21

28

Step-by-step explanation:

1) if r = -4

Substitute r = -4 in 3r - 9

= 3 * (-4) - 9

= -12 - 9

= -21

2) ( 4 / 7 ) * x = 16

 4 * x = 16 * 7

 x = 4 * 7

 x = 28

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