Question

resolva as seguintes equações de 1° A)2x+8+x=7-x
B)-x+2(1-x)=5x+2
C)2x/5+1/2-x/4=-8+x
D)x+1/3-2+x/7=1
E)2x/5-x-1/6+7=21+x/3+1​

Answer 1

Resposta:

a)x=-1/4

b)x=0

c) -10/143

d)56/45

e)-65/4

Explicação passo-a-passo:

a) 2x+8+x=7-x

3x+8=7-x

3x+x=7-8

4x= -1

x= -1/4

b)-x+2(1-x)=5x+2

-x+2-2x=5x+2

-x-2x=5x

-3x=5x

-3x-5x=0

-8x=0

x=0

c)2x/5+1/2-x/4=-8+x

2x/5+1/2-x/4=-7

8x+10-5x=-140x

3x+10=-140x

3x+140x=-10

143x=-10

x= -10/143

d)x+1/3-2+x/7=1

2x-5/3+x/7=1

42x-35+3x=21

45x-35=21

45x=21+35

45x=56

x=56/45

e)2x/5-x-1/6+7=21+x/3+1

2x/5-x+41/6=22+x/3

-18x-10x=660-205

-28x=455

x= -65/4