Question

resolva as equações de 1° grau a) 3(x-2)-5(x-1)=-7


b) x/2 + x-2/3=1/2​

Answer 1

Resposta:

3(x-2)-5(x-1)=-7

3x-6-5x+5 = 7

3x-5x-6+5-7= 0

-2x-8= 0

x=8/(-2)

x= -4

b) x/2 + x-2/3=1/2

(x+2x)/2= 1/2+2/3

(x+2x)/2= (3+4) /6

3x/2 = 7/6

3x= 7/6X2

x= 14/6 ÷ 3

x= 14/18 (÷2)

x= 7/9