Question

Resolva as equacoes do 1*grau. A) 3 (x+2)=2 (x-7) b) 3 (2x-3)+x=5

Answer 1

3(x+2)=2(x—7)

3x+6 = 2x—14

3x—2x = —14—6

x = —20

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3(2x—3)+x=5

6x—9+x=5

7x = 5+9

7x = 14

x = 14/7

x=2

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Answer 2

Resposta:

A) 3 (x+2) = 2 (x-7)

3x + 6 = 2x -14

3x - 2x +6 -14 = 0

x - 8 = 0

x = 8

B) 3(2x-3)+ x =5

6x -9+x = 5

7x -9 =5

7x = 5 + 9

7x = 14

x = 14 ÷ 7

x = 2