Question

1) Resolva as equacoes :

a) 3x+5+7

b) 7x-2+25

c) 4x+3+2x-15

d) -20+3x+40+x

Answer 1

Resposta:

a)3x+5+7

3× +12

-12=3x

x=-12/3

×=-4

b)7x-2+25

7×=-23

×=-23/7

c)4x+3+2x-15

4×+2x-15+3

6x-12

6x=12

x=12/6

×=2

d)-20+3x+40+x