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Anuta_ua [19.1K]
3 years ago
10

Does anyone know this?

Mathematics
1 answer:
Lera25 [3.4K]3 years ago
4 0

Answer:

8/21

Step-by-step explanation:

-1/3 + 5/7=1×7 =-7/21 +15/21

- × -

3. 7

-7/21 + 15/21= -7+15 = 8/21

-----

21

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3a-4b=12 what does a solve?
leonid [27]

Answer:

a = 4 + -1.333333333b

Step-by-step explanation:

Simplifying

3a + 4b = 12

Solving

3a + 4b = 12

Solving for variable 'a'.

Move all terms containing a to the left, all other terms to the right.

Add '-4b' to each side of the equation.

3a + 4b + -4b = 12 + -4b

Combine like terms: 4b + -4b = 0

3a + 0 = 12 + -4b

3a = 12 + -4b

Divide each side by '3'.

a = 4 + -1.333333333b

Simplifying

a = 4 + -1.333333333b

8 0
3 years ago
joe spends $8 on lunch and $6.50 on dry cleaning. He also buys 2 shiets that cost the same amount. joe spendes a total of $52. w
ANEK [815]
X=amout the shirts cost
52=8+6.50+2x
add 8 and 6.5
52=14.5+2x
subtract 14.5 from 52
37.5=2x
divide 37.5 by 2
x=18.75
It cost $18.75 for each shirt.
4 0
3 years ago
Can someone please help me I’ll give brainlsit put in ur order please don’t be wrong
Alex

Answer:

just look it up on the internet and it will have brainly and you click on the one that says brainly an you will have the answer

3 0
3 years ago
PLEASE HELP!!!!!!!!!!!!
Dafna11 [192]

Answer:

10

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Which equation is equivalent to
Paul [167]

Answer:

c) 3x - 45 = 10

Step-by-step explanation:

\frac{1}{5}x-3=\frac{2}{3}\\\\\frac{1}{5}x-\frac{3*5}{1*5}=\frac{2}{3}\\\\\frac{x-15}{5}=\frac{2}{3}\\

Cross multiply,

3*(x - 15) = 2*5

3*x - 3*15 = 10

3x - 45 = 10

4 0
3 years ago
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