3 years ago

-9 + x =12 what is x?

Mathematics

2 answers:

dolphi86 [110]3 years ago

3 0

Answer:

x = 21

Step-by-step explanation:

-9 + x = 12

+9 +9

x=21

seropon [69]3 years ago

3 0

X is 21 because we need at least 9 to get it back to zero because it’s a positive number then add 12 because that the number you need to get to and 21-9= 12

You might be interested in

PICTURE IS SHOWNN HELP

just olya [345]

C and D are correct because 25 > 35 so that's C.

Its also D because they are not equal.

Hope this helps :)

3 0

3 years ago

Read 2 more answers

what is the length of tw¯¯¯¯¯¯ ? segment t w with point u between t and w. segment t u is marked congruent to segment u w. segme

Gennadij [26K]

T________U________W
16
TU=UW
16=16
TW=TU+UW
TW=16+16
TW=32

6 0

3 years ago

Read 2 more answers

Which expressions are equivalent?

vova2212 [387]

A) 3(a - b) = 3*a +3*-b = 3a - 3b EQUAL

b) 2a(2 + b) = 4a + 2ab NOT EQUAL

3 0

4 years ago

Read 2 more answers

In 1980, the number of African elephants was 1,200,000 but that number was decreasing 5.25% a year.

algol13

<span>Answer is about 12.85.</span>

3 0

3 years ago

Giovanni purchased 25tickets to an airshow. the cost of an adult's ticket is $14 and the child's ticket is $8. if the total cost

Masteriza [31]

Giovanni purchased 20 adult tickets and 5 child's tickets.

Step-by-step explanation:

Let,

x = Adult tickets

y = Child's tickets

According to given statement;

x+y=25 Eqn 1

One adult ticket costs $14 and one child ticket costs $8, therefore,

14x+8y=320 Eqn 2

$Multiplying\ Eqn\ 1\ by\ 8\\8(x+y=25)\\8x+8y=200\ Eqn\ 3\\Subtracting\ Eqn\ 3\ from\ Eqn\ 2\\(14x+8y)-(8x+8y)=320-200\\14x+8y-8x-8y=120\\6x=120\\Dividing\ both\ sides\ by\ 6\\\frac{6x}{6}=\frac{120}{6}\\x=20$

Putting value of x in Eqn 1;

$20+y=25\\y=25-20\\y=5$

Giovanni purchased 20 adult tickets and 5 child's tickets.

Keywords: Linear equations, Addition

Learn more about linear equations at:

#LearnwithBrainly

6 0

4 years ago