Exercis.
1. Solve and check, whether
not
(a) 3x - 9 = 12
Answers
Answered by
20
Answer:
3x - 9 = 12
3x =12+9
3x =21
x = 21÷3
7 is the answer mark as brainiest
Answered by
15
Answer:
Step-by-step explanation:
3x-9=12
3x=12+9
3x=21
x=21/3
x=7
checking
3x-9=12
3*7-9=12
21-9=12
the equation is correct
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