Question

1)Să se rezolve ecuațiile:
a) 2x-20=7x+16
b)3x+12=6x-27
c) 3x+12/3=5/8
d)8x/3=5/9
cu o poză vă rog frumos​

Answer 1

Răspuns:

a) 2x-20=7x+16

2x-7x=16+20

-5x=36=>x= -36/5

b)3x+12=6x-27

3x-6x=-27-12

-3x=-39=>x= 39

c) 3x+12/3=5/8

²⁴⁾3x=³⁾5/8-⁸⁾12/3

72x=15-96

x=(-81/72)⁽⁹=>x= -9/8

d)8x/3=5/9

8x·9=3·5

72x=15=>x= 15/72