Question

a)10x+5=3(3x+2)
b)8x+9x-3+2=5x-1
c) 7x+4=2(x-8)
d)6x+9x-3+2=3x+1
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Answer 1

Resposta:

a) x=1

b) x=12

c) x= -4

d) x=1/6

Explicação passo-a-passo:

a)10x+5=3(3x+2)

10x+5=9x+6

10x-9x=6-5

x=1

b)8x+9x-3+2=5x-1

8x+9x-5x=-1+3-2

17x-5x=+2-2

12x=0

x=0/12

x=12

c) 7x+4=2(x-8)

7x+4=2x-16

7x-2x=-16-4

5x= -20

x= -20/5

x= -4

d)6x+9x-3+2=3x+1

6x+9x-3x=1+3-2

15x-3x=4-2

12x=2

x= 2/12(:2) = simplificação = 2(:2) e 12(:2) = 1/6

x=1/6