21 - 3(x - 7) = x + 20 ; the value of x = 5
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Given equation is 21−3(x−7)=x+20
⇒21−3x+21=x+20
⇒42−3x−x−20=0
⇒−4x=−22
⇒x=
4
22
∴ x=
2
11
=5.5
the answer is 5.5
_____
Answered by
0
Answer: 21-3x+21=x+20
42-3x=x+20
x+3x=42-20
4x=22
x=21/4=5.5
x=5.5
Step-by-step explanation:
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