Question

resolva as equações
a)4x-1=2x+9
b)5x+3=4x-5
c)3x-4=5x+6
d)2x-3=3x-1
e)3(x-2)+7=15
f)-2(x-1)+7=15
g)5-3(x+2)=-1


me ajudem e pra até meia noite!!!!!!!!!!!​

Answer 1

Resposta:

a)4x-1=2x+9

4x-2x=+1+9

2x=+10 x= 10/2 x=5 S={5}

b)5x+3=4x-5

5x-4x=-3-5

1x=-8 x= -8/1 x=-8 S={-8}

c)3x-4=5x+6

3x-5x=+4+6

-2x=+10 x= 10/-2 x=-5 S={-5}

d)2x-3=3x-1

2x-3x=+3-1

-1x=+2 x= 2/-1 x=-2 S={-2}

e)3(x-2)+7=15

3x-6+7=15

3x=15-6+7

3x=16 x=16/3 x=16/3 S={16/3}

f)-2(x-1)+7=15

-2x-2+7=15

-2x=15+2-7

-2x= 10 x= 10/-2x x=-5 S={-5}

g)5-3(x+2)=-1

5-3x+6=-1

3x=-1-5-6

3x=-12 x=-12/3 x=-4 S={-4}