Question

2-Calcule as seguintes equações:
a) 2.(x+3) = -3.(x + 4)
b) 4.(x+5) + 3.(x+3) = 2.(x-3)
c) 2.(x-3) + 4.(x +5) = 3.(x-5) - 2.(x+4)
+​

Answer 1

Resposta:

a) 2.(x+3) = -3.(x + 4)  =>  2x +6 = -3x -12  => 5x= -18  => x= -18/5

b) 4.(x+5) + 3.(x+3) = 2.(x-3)  => 4x + 20 +3x +9= 2x -6  => 4x + 3x -2x= -6 -29

5x= -35  => x= -35/5  => x= -7

c) 2.(x-3) + 4.(x +5) = 3.(x-5) - 2.(x+4)

2x -6 +4x +20 = 3x -15 -2x -8

2x +4x -3x +2x = -15 -8 -20 +6

5x= -37

x= -37/5

Explicação passo a passo: bons estudos.