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nata0808 [166]
3 years ago
6

Justify each step in solving the equation 4X equals seven times X -3

Mathematics
2 answers:
torisob [31]3 years ago
5 0
4x = 7(x-3)

1.  Distribute that multiplicand 7:  4x = 7x - 21

2.  Group the x terms together:  Subtract 4x from both sides:  0 = 3x - 21

3.  Solve for x:  Add 21 to both sides:  21 = 3x

4.  Divide both sides by 3 to obtain x = 7 (answer)
Ad libitum [116K]3 years ago
5 0
4X=7X-3

Solve for X:
4 X = 7 X - 3
Subtract 7 X from both sides:
4 X - 7 X = (7 X - 7 X) - 3
4 X - 7 X = -3 X:
-3 X = (7 X - 7 X) - 3
7 X - 7 X = 0:
-3 X = -3
Divide both sides of -3 X = -3 by -3:
(-3 X)/(-3) = (-3)/(-3)
(-3)/(-3) = 1:
X = (-3)/(-3)
(-3)/(-3) = 1:
Answer:  X = 1
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Troyanec [42]

Answer:

<h2>x = 20</h2>

Step-by-step explanation:

The angles 7x° and (x + 20)° are supplementary angles.

Supplementary angles add up to 180°.

Therefore we have the equation:

7x + (x + 20) = 180

7x + x + 20 = 180            <em>subtract 20 from both sides</em>

8x = 160         <em>divide both sides by 8</em>

x = 20

8 0
3 years ago
Denise makes three times as many chocolate cupcakes as vanilla cupcakes. She also makes three dozen strawberry cupcakes. If Deni
slamgirl [31]

Answer:

6 dozens

Step-by-step explanation:

Vanilla, v = x

Chocolate, c = 3x

Strawberry, s = 3 dozens = 36

Total cupcakes = 132

Hence,

x + 3x + 36 = 132

4x = 96

x = 96 / 4

x = 24

Chocolate = 3 * 24 = 72

Dozens of chocolate = 72 /12 = 6 dozens

7 0
2 years ago
At Least One Defective iPhone It has been reported that 20% of iPhones manufactured by Foxconn for a product launch did not meet
bija089 [108]
We can use the binomial theorem to find the probability that 0 out of the 15 samples will be defective, given that 20% are defective.
P(0/15) = (15C0) (0.2)^0 (1 - 0.2)^15 = (1)(1)(0.8)^15 = 0.0352
Then the probability that at least 1 is defective is equal to 1 - 0.0352 = 0.9648. This means there is a 96.48% chance that at least 1 of the 15 samples will be found defective. This is probably sufficient, though it depends on her significance level. If the usual 95% is used, then this is enough.
7 0
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What is the value of x + 3y + z if x = 4, y = 5, and z= 22<br>a) 16<br>b) 41<br>c) 2​
fgiga [73]

Answer:

OPTION B - 41

Step-by-step explanation:

An expression is given and the corresponding values for the expression are also given. We have to substitute the given values to arrive at the answer.

The given expression is:   x + 3y + z.

Also given: x = 4, y = 5, z = 22.

Substitute these values in the above expression, we get:

4 + 3(5) + 22 = 4 + 15 + 22 = 41.

∴                                       x + 3y + z = 41

3 0
2 years ago
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xz_007 [3.2K]
No clue if this is right

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