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saul85 [17]
3 years ago
13

Can someone please help me

Mathematics
1 answer:
gtnhenbr [62]3 years ago
8 0

Answer:

1) B) 10

2) B) 9

Step-by-step explanation:

1) 10x+15=115

10x=100

x=10

2) 12x+17=125

12x=108

x=9

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4 0
3 years ago
5a – 10b = 45, when b = 3
balandron [24]


Well, since you have the value of b, the first thing you want to do is substitute that value in for b.

5a - 10(3) = 45

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5a - 30 = 45

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Now, you divide by 5 to finish getting a by itself.

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Hope this helps!

6 0
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ax+bx-c=0 \\
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