Question

Rezolvati Ecuatiile: a)7/18+x=19/15
b)9*x=12
c) x*4/25=16/5
d) (35/24):4=2,(3)
e) 4x+5=x+13
f)11x+17=2x+21

Answer 1

a)7/18+x=19/15

x=19/15-7/18

x=19*6-7*5)/90

x=(114-35)/90

x=79/90

b)9*x=12

x=12/9=4/3

c) x*4/25=16/5

4x/25=(16*5)/25

4x=16*5

x=20

d) (35/24):4=2,(3)

2,(3)=(23-2)/9
unde este necunoscuta?

e) 4x+5=x+13

4x-x=13-5

3x=8

x=8/3

f)11x+17=2x+21
11x-2x=21-17

9x=4

x=4/9