Question

05) Determine a raiz de cada equação:
a) 3(x + 3) - 1 = 2
b) 3(x + 2) = 2(x-7)
c) 3(x+2)-2(x+3)+6=0
d) 6x+3(x+1)-7=2(2x-1)-4(1-x)​

Answer 1

Cálculos:

A) 3(x+3)-1=2

3x+9-1=2

3x=2-9+1

3x= -8

x= -8÷3 = −2,66...

B) 3(x+2)=2(x-7)

3x+6=2x-14

3x-2x=-14-6

x= -20

C) 3(x+2) - 2(x+3)+6=0

3x +6 - 2x + 6 +6 =0

3x-2x = 0-6-6-6

x= -18

D) 6x+3(x+1)-7=2(2x-1)-4(1-x)

6x+3x+3-7 = 4x-2-4-4x

6x+3x-4x+4x= -2-4-3+7

9x= -2

x= -2÷9 = −0,222....