Question

rezolvati ecuatiile va rog mult:
sunt in imagine.

Answer 1

a)7x=42•15/9=14•5=>x=70/7=10
x=10
b)x= 44•31/41•4=>
x= 11•31/41=>
x= 341/41
c)x= 2,5•37/0,74•9=>
x= 2,5•50/9=>
x=125/9

Answer 2

a)
4x=$\frac{15*42}{9}$=$\frac{630}{9}$
4x=70 | :4
x=17,5

b)$\frac{4x}{31} = \frac{44}{41}$
4x=$\frac{31*44}{41}$=$\frac{1364}{41}$
4x=33,2 |:4
x=8,31

c)$\frac{9x}{37} = \frac{2,5}{0,74}$
9x=$\frac{37*2,5}{0,74} = \frac{92,5}{0,74}$
9x=125 |:9
x=13,8