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3 years ago

4x/5 - 3x/7 = 4x/7 + 5x/7 can anyone please help with explanation...

Mathematics

1 answer:

kirill115 [55]3 years ago

7 0

Answer: x=0

Step-by-step explanation:

Multiply both sides of the equation by 35, the least common multiple of 5,7.

7×4x−5×3x=5×4x+5×5x

Multiply 7 and 4 to get 28.

28x−5×3x=5×4x+5×5x

Multiply −5 and 3 to get −15.

28x−15x=5×4x+5×5x

Combine 28x and −15x to get 13x.

13x=20x+25x

Combine 20x and 25x to get 45x.

13x=45x

Subtract 45x from both sides

13x−45x=0

Combine 13x and −45x to get −32x

−32x=0

Product of two numbers is equal to 0 if at least one of them is 0. Since −32 is not equal to 0, x must be equal to 0.

X=0

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3 years ago

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3 years ago

1. Use the quadratic, x? + 18x = 25 to answer the following questions.

makvit [3.9K]

Answer:

FIRST PROBLEM:

Exact Form:

x = 25 /19

Decimal Form:

x = 1.31578947

Mixed Number Form:

x = 1 6 /19

SECOND PROBLEM

Exact Form:

x = − 9 + √ 106 , − 9 − √ 106

Decimal Form: x = 1.29563014 , − 19.29563014

Step-by-step explanation:

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3 years ago

4x/5 - 3x/7 = 4x/7 + 5x/7 can anyone please help with explanation...​

4x/5 - 3x/7 = 4x/7 + 5x/7 can anyone please help with explanation...