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.
