Question

1)resolva as equações
A)2(x-6)=- 3(5+x)
B)3(x+10)- 2(x-5)=0
C)3(x-1)- (2x-4)=1
D)7(x-1)- 2(x-5)=x-5

Answer 1

a) 2x -12= -15 -3x
2x +3x= +12 -15
5x = 3
x= 5/3

b) 3x +30 -2x +10=0
3x -2x = -30 -10
5x = -20
x= -20÷5
x= -4

c)3x -3 -6x -12=1
3x -6x= +3 +12 -1
-3x = 14. (-1)
3x= -14
x= 14/3

d) 7x -7 -2x +10= x-5
7x -2x -x= +7 -10 -5
4x= -8
x = -8÷4
x = -4