mbmontgomery7
Answered

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solve 2a + 3c = 17a - 21 for c. step by step explanation

Sagot :

jayfuzzy213

Answer:

15a = 18c

Step-by-step explanation:

2a + 3c = 17a - 21c

-2a -2a

3c = 15a - 21c

-3c -3c

15a = 18c

AlgebraicAardvark
To “solve for c” means to get c by itself.

Step 1: get anything without a c to other side:
2a - 2a + 3c = 17a -2a - 21
                3c = 15a - 21

Step 2: get rid of the 3 on 3c. Since 3c means 3•c, you need to divide 3 away:
3c / 3 = (15a-21) / 3

Make sure you divide EVERYTHING on the right (both 15a and -21) by 3.

Do the division and you’ll have your answer.
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