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Sholpan [36]
3 years ago
8

please help solve this problem the - is a negative sign. (2b+-7)+5(b+-3)

Mathematics
1 answer:
enyata [817]3 years ago
3 0

Answer:


Step-by-step explanation:

(2b+-7)+5(b+-3)

Multiply 5 throughout the second parentheses

(2b-7)+(5b-15)

Add 2b and 5b

7b-7-15

Subtract -7 and -15

7b-22

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Answer:

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Step-by-step explanation:

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7 0
2 years ago
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3 years ago
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The extremes in the proportion 3/4=15/20 are
ollegr [7]

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3 0
3 years ago
S x=2-2y<br> 18)-1= -2x - 3y
jok3333 [9.3K]

For this case we have the following system of equations:

x = 2-2y\\-1 = -2x-3y

We substitute the first equation in the second equation:

-1 = -2 (2-2y) -3y\\-1 = -4 + 4y-3y\\-1 = -4 + y\\-1 + 4 = y\\y = 3

Now, we look for the value of the variable "x":

x = 2-2 (3)\\x = 2-6\\x = -4

Thus, the solution of the system is given by:

(x, y): (- 4,3)

Answer:

(x, y): (- 4,3)

3 0
3 years ago
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