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AysviL [449]
4 years ago
15

What is the solution to the system of equations below?

Mathematics
2 answers:
noname [10]4 years ago
8 0

Answer:

solution: (9, 3) ,   x = 9, y = 3

Step-by-step explanation:

Negative 4 x + 6 y = negative 18 and y = negative 2 x + 21

convert to algebra.

- 4x + 6y = -18 ;

y = -2x + 21;

let us solve this with elimination

change -4x + 6y = -18  to  -2x + 3y = -9

get:  -2x  + 3y = -9

and  2x + y = 21

add.

-2x + 2x + 3y + y = -9 + 21

4y = 12

y = 3

2x + (3 ) = 21

2x = 18

x = 9

(9, 3)

Veronika [31]4 years ago
4 0

Answer:

A.(9,3)

Step-by-step explanation:

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Veronika [31]

The simplified expression of 6(y + 13) + 21y is 27y + 78

<h3>How to simplify the expression?</h3>

The expression is given as:

6(y + 13) + 21y

Open the brackets

6 * y + 6 * 13 + 21y

Evaluate the product

6y + 78 + 21y

Collect the like terms

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Hence, the simplified expression of 6(y + 13) + 21y is 27y + 78

Read more about simplified expressions at

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