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jek_recluse [69]
3 years ago
6

Solve the equation for 3x-y = -3

Mathematics
1 answer:
S_A_V [24]3 years ago
8 0

Answer:

sln

3x-y=-3

3x-y=-3(make subject x)

3x=-3+y(divided by 3 both sides)

x=(-3+y) /3,x=-1+y /3

find y

3x-y=-3

-y=-3-3x(put the value of x)

-y=-3-3(-1+y/3)

-y=-6(-1+y/3)

-y=6+y/3

-y-y/3 =-3

-4y/3=-3(X by 3 both sides)

--4y=-6(divided by - 4 both sides)

y=1.5

find x

3x-y= -3 (put the value of y)

3x-1.5= -3

3x=-3+1.5

3x=-1.5(divided by 3 both sides)

x=-0. 5

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4 years ago
In a two-digit number, the tens digit is 5 less than the units digit. The number itself is five more than three times the sum of
Luden [163]

Given:

In a two-digit number, the tens digit is 5 less than the units digit.

The number itself is five more than three times the sum of its digits.

To find:

The number.

Solution:

Let the two digit number is ab. So,

ab=10a+b

Tens digit is 5 less than the units digit.

a=b-5       ...(i)

The number itself is five more than three times the sum of its digits.

10a+b=3(a+b)+5

10a+b=3a+3b+5

10a+b-3a-3b=5

7a-2b=5          ...(ii)

Using (i) and (ii), we get

7(b-5)-2b=5

7b-35-2b=5

5b=5+35

5b=40

b=8

Putting b=8 in (i), we get

a=8-5

a=3

Therefore, the required number is 38.

5 0
3 years ago
Read 2 more answers
I WILL UPVOTE YOUR ANSWER!!<br> ANSWER THIS CORRCTLY<br> THANK YOU!
kramer
-0.85, 0.25, 60, 60 2/40
hope this helps! :)
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3 years ago
I need help with this question ​
m_a_m_a [10]

Welcome to Gboard clipboard, any text you copy will be saved here.

6 0
3 years ago
Which is the sixth sequence: an=1/125 (5n-1)
Volgvan
1. Distribute
1/125 x 5n - 1/125
2. Simplify 1/125 x 5n to n/25
n/25 - 1/125
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3 years ago
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