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CaHeK987 [17]
3 years ago
7

If 5(3x-7)=20, then what is 6x-8 ?

Mathematics
1 answer:
Colt1911 [192]3 years ago
3 0
First solve for x in the first equation. So you'll have to substitute,
5(3x-7)=20
15x-35=20
Then add 35 to both sides.
15x=55
Divide 55 by 15.
So x = 3.66...
Then plug in 3.7 for x in 6x-8
6(3.7)-8
Its approximately 14.2
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x=165

Step-by-step explanation:

Multiply both sides by 15

15(x/15)=11*15

x=165

7 0
3 years ago
Would like to k ow the answer ?!
Arlecino [84]

Answer:

yessirrr cuz ion kno the answer to this question

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What is the equation of the line that passes through the points (−2, 1) and (1, 10)?
Anna71 [15]
Slope = (10-1)/(1+2) = 9/3 = 3

y = mx + b
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equation

y = 3x + 7  
or
3x - y = -7

answer is <span>3x − y = −7 (first choice)</span>
6 0
3 years ago
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How many solutions does 8x = 56 have?
OlgaM077 [116]
There is only one answer, x=7
3 0
3 years ago
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Use addition to solve the linear system of equations. Include all of your work in your final answer.
nadezda [96]
You just have to add one eqaution to another :
-x + x -y + 2y = 7 + 7
y = 14
Then apply y = 14 to one of the equations :
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x + 28 = 7
x = - 21
The awnser is x= -21 y= 14
I hope i awnsered your question
3 0
3 years ago
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