The sixth grade mathematics gold medal lesson one exercise 6.3 One-dimensional equation and its solution (1) (Volume A) The answer and solution to the third big question. Or teach solutions.

2X- 15=3

Solution: 2X= 15+3

X= 18/2

X=9

4X+7=2X-5

I can't figure it out ~ Look, if you add a 4X on the left and a 2X on the right, it will naturally be the big one on the left! Plus you have to subtract a 5 from the right, how can the two sides be equal?

8X-7=7X-3

Solution: 8X-7X=7-3

X=4

1. 1-4X=2.2-3X

This question is really strange ~ the dividend on the left was originally smaller than that on the right, and now the subtraction is larger than that on the right. How can it be equal? Did you copy the title wrong? Or am I wrong? Or is it impossible?

1/3X-7=6

Solution: 1/3X=7+6.

X= 13*3

X=39

5/3X=2=3X-6

Solution: X=2*(3/5) or 3X-5/3X=6.

X=6/5 12/5X=6

X=6*(5/ 12)

X=5/2

Why is the answer to the last question different? I'm really confused ~ (note: all the above marked "/"are scores)

I really don't understand. Am I really wrong?

Find out the regular problems in mathematics according to the given shape,