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Urgently beg. The first semester of junior high school olympiad math problem 120! ! !
1.4X+5=9

2.2(9-X)=0

3.0.5X+5X= 1 1

4.( 12+9)X=5

5.8X-5X=3

6. 1.2X×5= 12

7. 18- 12=6X+6

8. 100-99X= 100-99

9. 15X÷5=9

10.65÷5×X=26

1 1.22+ 18X=40

12.5X×9= 180

13. 15X÷3+ 12=36

14.20-5X+5=20

15.50X-50=50

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