Overview: 1 questions will be solved this time.Among them
           ☆1 equations

[ 1/1 Equation]
    Work: Find the solution of equation 3*N*129*0.2+400 = N*129*0.8+400 .
    Question type: Equation
    Solution:Original question:

3

N

×

129

×

1 5

+

400

=

N

×

129

×

4 5

+

400

Left side of the equation =

387 5

N

+

400

    The equation is transformed into :

387 5

N

+

400

=

N

×

129

×

4 5

+

400

Right side of the equation =

N

×

516 5

+

400

    The equation is transformed into :

387 5

N

+

400

=

516 5

N

+

400

    Transposition :

387 5

N

−

516 5

N

=

400

−

400

    Combine the items on the left of the equation:

-

129 5

N

=

400

−

400

    Combine the items on the right of the equation:

-

129 5

N

=

0

    By shifting the terms and changing the symbols on toth sides of the equation, we obtain :

-

0

=

129 5

N

    If the left side of the equation is equal to the right side, then the right side must also be equal to the left side, that is :

129 5

N

=

-

0

    The coefficient of the unknown number is reduced to 1 :

N

=

-

0

÷

129 5

=

-

0

×

5 129

    We obtained :

N

=

0

    This is the solution of the equation.

Your problem has not been solved here? Please take a look at the  hot problems ！