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777dan777 [17]
3 years ago
9

28 - 2 (5a - 3) = 47

Mathematics
1 answer:
Alex787 [66]3 years ago
5 0

Answer: a=-1.3

Step-by-step explanation:

1) Reorder the terms: 28 + (-3 * -2 + 5a * -2) = 47

28 + (6 + -10a) = 47

2) Solving: 34 + -10a = 47

3) Add -34 to each side of the equation: 34 + -34 + -10a = 47 + -34

4) Combine like terms: 34 + -34 = 0: 0 + -10a = 47 + -34

-10a = 47 + -34

5) Combine like terms: 47 + -34 = 13: -10a = 13

6) Divide each side by -10: a = -1.3

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