Solution:1/3x+1/2x =16 (write the number of division components).

5/6x = 16

5/6x× 6/5 = 16x6/5 (the left and right sides of the equation are multiplied by six fifths at the same time)

x = 19.2

Question 2: X÷÷4+3 = X÷÷3-8/3

Solution: 1/4x+3 = 1/3x-8/3 (write division as a fraction).

1/4x+3+8/3 =1/3x-8/3+8/3 (eight thirds are added to the left and right sides of the equation at the same time).

1/4x+17/3-1/4x =1/3x-1/4x (subtract1/4x from both sides of the equation).

1/ 12x= 17/3

1/ 12x× 12 = 17/3× 12

x=68

Question 3: (x-2/5x)÷4=3/4

Solution: 3/5×4×4 = 3/4×4.

3/5x × 5/3=3 × 5/3

x=5

Question 4: (Equation solution)

Solution: Let B be X, then A is 1/3x, and C is 1/3x × 3/4= 1/4x.

x+ 1/3x+ 1/4x = 1 14

19/ 12x = 1 14

19/ 12x× 12/ 19 = 1 14× 12/ 19

x=72

There are many kinds of arithmetic solutions, and here are two easy to understand:

The first type: (proportional solution) is written in proportional form according to fractional sentences.

A: B = 1: 3 = 4: 12 (Note: the number of copies of A in the two proportions is different and must be unified).

A: C = 4: 3.

A: B: C = 4: 12: 3.

No. B:114×12/19 = 72.

The second kind: (fractional solution)

Thinking: find out the corresponding scores of a, b and C.

The score of B is "1", and the score of A is 1/3.

C is 3/4 of A, that is, the score of C is 3/4+0/3 of 65438.

And 1 14 is the sum of a, b and c, and the corresponding score 1 14 is the sum of a, b and c, so,

Quantity ÷ Quantity corresponding score = quantity unit "1" (that is, B)

b: 1 14÷( 1+ 1/3+ 1/3×3/4)= 72。

Students, I gave you an answer completely with the knowledge in your textbook. I think you should understand! I wish you progress in your study!