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[ 1/1 Equation]
    Work: Find the solution of equation （87－4x）x3 = 69＋x .
    Question type: Equation
    Solution:Original question:

(

87

−

4

x

)

x

×

3

=

69

+

x

    Remove the bracket on the left of the equation:

Left side of the equation =

87

x

×

3

−

4

x

x

×

3

=

261

x

−

12

x

x

    The equation is transformed into :

261

x

−

12

x

x

=

69

+

x

    The solution of the equation:
        x₁≈0.268717 , keep 6 decimal places
        x₂≈21.397949 , keep 6 decimal places    
    There are 2 solution(s).

解程的详细方法请参阅：《方程的解法》

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