Question

Ma puteti ajuta va roggg ​

Answer 1

1. Cand ai egalare de fractii atunci folosesti metoda asta

a/b=c/d , ad= bc

ab=2×5

ab=10

2. ab=3×7

ab= 21

ab-15= 21-15= 6

3. ab=24

2ab-24= 2×24-24= 24(2-1)= 24

4. 3ab=30

ab=30:3

ab=10

4ab+7= 4×10+7= 40+7=47

5. ab=660

ab/11-60= 660/11-60= 60-60=0

6. a) 6x=15

x=15/6= 5/2

b) 4x=6

x= 6/4=3/4

e) 6(x+2)=21

6x+12=21

6x=9

x= 3/2

f) 4(x-1)=15

4x-4=15

4x=19

x=19/4