Question

3). 21-3(x-7)=x+20​

Answer 1

Answer:

5.5

Step-by-step explanation:

21 - 3(x-7) = x + 20

21 - 3x + 21 = x + 20

- 3x - x = 20 - 21 - 21

-4x = -22

4x = 22

x = 22/4

x = 5.5

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