3 years ago

QUESTION: Solve -5x = 9

Mathematics

1 answer:

sweet-ann [11.9K]3 years ago

8 0

Answer:

-45

Step-by-step explanation:

hope this helps

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Solve each system by substitution.<br> y=5x-7<br> -3x-2y=-12<br> Type in your solution (x,y)

aksik [14]

<h3>Given system :</h3>

$y = 5x - 7 \\ - 3x - 2y = - 12$

<h3>Solution to the system :</h3>

Substitute the given value of y into the equation -3x-2y=-12

$- 3x - 2(5x - 7) = - 12$

Distribute -2 through the parentheses

$- 3x - 10x + 14 = - 12$

Collect like terms

$- 13x + 14 = - 12$

Move the constant to the right-hand side and change its sign

$- 13x = - 12 - 14$

Calculate the sum and divide both sides of equation by -13

$x = 2$

Now, Substitute the given value of x into y=5x-7

$y = 5(2) - 7$

Multiply the numbers

$y = 10 - 7$

Subtract the numbers

$y = 3$

The possible solution of the system is the ordered pair (x,y)

$(x,y)=(2,3)$

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