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VARVARA [1.3K]
3 years ago
9

3. If 4 is subtracted from twice a number the result is 10 less than the number

Mathematics
1 answer:
S_A_V [24]3 years ago
7 0

3.

2x - 4 = 10

<em><u>Add 4 to both sides.</u></em>

2x = 14

<em><u>Divide both sides by 2.</u></em>

<u>x = 7</u>

4.

3(x/2) = x/4

<em><u>Distributive property.</u></em>

3x/2 = x/4

<em><u>Convert denominators to a common number.</u></em>

6x/4 = x/4

<em><u>Multiply both sides by 4.</u></em>

6x = x

<em><u>Subtract x from both sides.</u></em>

5x = 0

<em><u>Divide both sides by 5.</u></em>

x = 0

This equation is equal to 0.

5.

3(n + 2) = n - 5

<em><u>Distributive property.</u></em>

3n + 6 = n - 5

<em><u>Subtract n from both sides.</u></em>

2n + 6 = -5

<em><u>Subtract 6 from both sides.</u></em>

2n = -11

<em><u>Divide both sides by 2.</u></em>

n = -5.5

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