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First, simple types.

x- x= 2x + =？ 70%x+ 20%x = 3.6？ x×=20× 25% + 10x =？

x- 15% x = 68 x+x = 12 1？ 5x-3×= x÷= 12 6x+5 = 13.4？

x + x = 4？ 4x-3 ×9 = 29？ x+x= 4x-6×=2

÷x = x =×x \u= x？

2. Equations with many operations on one side.

For this kind of equation, we must first calculate what can be calculated according to the algorithm.

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Third, the equation in brackets.

For questions with brackets, we usually remove the brackets first, and then calculate according to the above method.

Fourth, the equation uses the laws of multiplication and distribution.

Use the multiplication distribution law first, and then remove the brackets.

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5. Equation with X on both sides

According to the properties of the equation, cancel the x on one side of the equation, and then follow the steps mentioned above.

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Sixth, comprehensive application.

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