Question

21-3(a-7)=a+20 find the value of a
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Answer 1

Step-by-step explanation:

21-3a+21=a+20

-3a-a=20

-4a=20

a=20/-4

a=-5

Answer 2

21-3a-21=a+20

21-3a=a+20+21

21-3a=a+41

21-3a-a=41

21-2a=41

-2a=41-21

-2a=20

a=20/-2

a=-20/2

a=-10

I hope it helps u