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Illusion [34]
3 years ago
14

Solve for a. Show your work (ALL steps must be shown): 3(a+3)+6=30

Mathematics
1 answer:
Whitepunk [10]3 years ago
4 0

Answer:

a = 5

Step-by-step explanation:

3(a+3)+6 = 30

subtract 6 from both sides

3(a+3) = 24

divide both sides by 3

a+3 = 8

subtract 3 from both sides

a = 5

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aivan3 [116]
> multiply the second equation by 2 and add it to the first equation.
2(-6x - 7y = -10)
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8x + 14y = 4
-12x - 14y = -20
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x = -16/-4
x = 4

> use x = 4 in either equation to find y
8(4) + 14y = 4
32 + 14y = 4
14y = 4 - 32
14y = -28
y = -28/14
y = -2


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