Question

Resolva as equações sendo v=Q a. 2x+3x+9=8(6-x) b.4(x+10)-2(x-5)=0 c. 3(2x+3)-4(x-1)=3 d.7(x-1)-2(x-5=x-5 e.2(3-x)=3(x-4)+15 f.3(5-x)-3(1-2x)=42

Answer 1

Resolva as equações sendo v=Q

a. )

2x+3x+9=8(6-x)
5x +9=48 -8x
5x+8x=48-9
13x= 39
x=39/13
x=3

b.)

4(x+10)-2(x-5)=0
4x+40-2x+10=0
2x+50=0
2x= -50
x=25

c. )

3(2x+3)-4(x-1)=3
6x+9-4x+4=3
2x+13=3
2x=3 -13
2x=-10
x= -5

d.)

7(x-1)-2(x-5)=x-5
7x-7-2x+10=x-5
5x-x= -5 -7
4x= - 12
x= - 3



e)
2(3-x)=3(x-4)+15

6-2x=3x-12+15
-2x-3x= 3 +6
-5x=9----*(-1)
5x= - 9
x= -9/5



f)
3(5-x)-3(1-2x)=42

15-3x-3+6x=42
-3x+6x=42 -12
3x=30
x=10