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Kamila [148]
4 years ago
9

Solve the following equation 7a-9=12​

Mathematics
2 answers:
nadya68 [22]4 years ago
8 0

Answer:

The value of a is 3.

Step-by-step explanation:

First, you have to add 9 to both sides to eliminate -9 on the left side :

7a - 9 = 12

7a - 9 + 9 = 12 + 9

7a = 21

In order, to find a, you have to divide it by 7 :

a = 21 \div 7

a = 3

mixas84 [53]4 years ago
6 0

7a-9=12

Add 9 to both sides:

7a= 21

Divide both sides by7

A= 3

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If you divide a positive number by a positive number

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