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3 years ago

What does x equal in -3(9+x)=33

Mathematics

2 answers:

photoshop1234 [79]3 years ago

8 0

No it does not, if you’re trying to solve for x you have to do PEMDAS

Artyom0805 [142]3 years ago

6 0

Answer:

x = -20

Step-by-step explanation:

-3(9+x)=33

1. Divide both sides by -3.

-3(9+x)/-3 = 33/-3

2. Simplify.

9 + x = -11

3. Subtract 9 from both sides.

9 + x - 9 = -11 - 9

4. Simplify.

x = -20

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Use properties to rewrite the given equation. Which equations have the same solution as 3/5x +2/3 + x = 1/2– 1/5x? Check all tha

vodomira [7]

we have

$\frac{3}{5}x+ \frac{2}{3}+x=\frac{1}{2}-\frac{1}{5}x$

Combine like terms in both sides

$(\frac{3}{5}x+ x)+\frac{2}{3}=\frac{1}{2}-\frac{1}{5}x$

we know that

$(\frac{3}{5}x+ x)=(\frac{3}{5}x+ \frac{5}{5}x)=\frac{8}{5}x$

substitute in the expression above

$\frac{8}{5}x+\frac{2}{3}=\frac{1}{2}-\frac{1}{5}x$ -----> equation A

Multiply equation A by $5*3*2=30$ both sides

$30*(\frac{8}{5}x+\frac{2}{3})=30*(\frac{1}{2}-\frac{1}{5}x)$

$48x+20=15-6x$ ---------> equation B

Group terms that contain the same variable, and move the constant to the opposite side of the equation

$48x+6x=15-20$

$54x=-5$ ---------> equation C

Solve for x

$x=-\frac{5}{54} =-0.09$

We are going to proceed to verify each case to determine the solution.

Case a) $\frac{8}{5}x+\frac{2}{3}=\frac{1}{2}-\frac{1}{5}x$

the case a) is equal to the equation A

the case a) have the same solution that the given equation

Case b) $18x+20+30x=15-6x$

Combine like terms in left side

$(18x+30x)+20=15-6x$

$(48x)+20=15-6x$

the case b) is equal to the equation B

the case b) have the same solution that the given equation

Case c) $18x+20+x=15-6x$

Combine like terms in left side

$(18x+x)+20=15-6x$

$(19x)+20=15-6x$

$19x+6x=15-20\\25x=-5\\x=-0.20$

$-0.20\neq -0.09$

therefore

the case c) not have the same solution that the given equation

Case d) $24x+30x=-5$

Combine like terms in left side

$54x=-5$

the case d) is equal to the equation C

the case d) have the same solution that the given equation

Case e) $12x+30x=-5$

Combine like terms in left side

$42x=-5$

$x=-5/42=-0.12$

$-0.12\neq -0.09$

therefore

the case e) not have the same solution that the given equation

therefore

the answer is

case a) $\frac{8}{5}x+\frac{2}{3}=\frac{1}{2}-\frac{1}{5}x$

case b) $18x+20+30x=15-6x$

case d) $24x+30x=-5$

7 0

4 years ago

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What percent of 2000 is 160? Show work

ArbitrLikvidat [17]

Hello from MrBillDoesMath!

Answer:

.08%

Discussion:

Let the percent be denoted "p". Then

2000 * p% = 160 => ( as p% = p/100)

2000* p/100 = 160 =>

20p = 160 =>

p = 8 or .08%

Regards,

MrB

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3 years ago

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There are 7 tigers in a castle,each tiger has 7 children,each child has 7 tiger friends,then how many tigers are there in the ca

Ksenya-84 [330]

There are 7 parent tigers
Parents = 7

7 tigers each have 7 children. That means there's total of 7 × 7 children.
Children = 7 × 7 = 49

Each child has 7 friends. That means there's total of 49 × 7 friends.
Friends = 49 × 7 = 343

Total = 7 + 49 +343 = 399 TIGERS
I'm not a tiger so I'm not counting myself.

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4 years ago

9(3x + 8) – 3(4x + 21)

Ann [662]

Answer:

15x + 9

Step-by-step explanation:

9(3x + 8) – 3(4x + 21)

Multiply

27x + 72 - 12x - 63

Combined like terms

27x - 12x = 15x 72 - 63 = 9

15x + 9

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Step 6: Choose the answer that has the numbers

jek_recluse [69]

Answer:

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Step-by-step explanation:

Um.. I did it from greatest to least but here it is!

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4 years ago

What does x equal in -3(9+x)=33​

What does x equal in -3(9+x)=33