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[ 1/1 Equation]
    Work: Find the solution of equation 6×x+7×x = 220 .
    Question type: Equation
    Solution:Original question:

6

x

+

7

x

=

220

Left side of the equation =

13

x

    The equation is transformed into :

13

x

=

220

    The coefficient of the unknown number is reduced to 1 :

x

=

220

÷

13

=

220

×

1 13

    We obtained :

x

=

220 13

    This is the solution of the equation.

    Convert the result to decimal form :

x

=

16.923077

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