Severiusdragomirask
a fost răspuns

1) 5X-1=29
2) 2(x+3)=x-18
3)7x+21=-42
Urgent va rog!!! ​

Răspuns :

Lifeisfullofcolourask

Răspuns:

5X-1=29

5x=29+1

5x=30

X=30:5

X=6

2(x+3)=x-18

2X+6=X-18

2X-X=-6-18

X=-24

7x+21=-42

7X=-42-21

7X=-63

X=-63:7

X=-9

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