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    Work: Find the solution of equation 120*X+180*X = 10000 .
    Question type: Equation
    Solution:Original question:

120

X

+

180

X

=

10000

Left side of the equation =

300

X

    The equation is transformed into :

300

X

=

10000

    The coefficient of the unknown number is reduced to 1 :

X

=

10000

÷

300

=

10000

×

1 300

=

100

×

1 3

    We obtained :

X

=

100 3

    This is the solution of the equation.

    Convert the result to decimal form :

X

=

33.333333

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