Question

Equação de primeiro grau

A)x+5+2 x=x -4

B)3x+10=x-5

C)x+15=-2x+10

D)5x+25=3+x+1

Answer 1

Resposta:

a )x + 5 +2x= x- 4

x+2x-x =-4 -5

2x= - 9

x= -9/2

b) 3x+ 10 =x-5

3x-x = -5-10

2x =-15

x = -15/2

c) x + 15 = -2x +10

x+2x = 10 -15

3x= -5

x= -5/3

d) 5x+25 = 3+x+1

5x-x  = 3+1 -25

4x= -21

x= -21/4