Question

resolva as equações. a)-2x-3=1 b)2x-4+6x c)8x-7=1+6x d)3(1-x)+4(x+1)=0 e)4x-5x-2x=4-10+4-10+4+5

Answer 1

a) -2x-3=1
-2x= 1+3
-2x=4
x=4÷2
x=2

b)

c) 8x-7=1
8x=1+7
8x= 8
x= 8÷8
x=1

d) 3(1-x)+4 (x+1)=0
3-3x +4x+4=0
-3x+4x= 0-4-3
1x= -7
x= -7÷1
x= -7

e) 4x-5x-2x=4-10+4-10+4+5
4x-7x= 9
-3x=9
x= 9÷ -3
x= -3