Question

Resolva as equações:

a) 4 ( x+2 ) = 3 ( x+3 )

b) 5 ( x-1 ) = 2 ( x+5 )

c) 3 ( x+2 ) = 4 ( x+4 )

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

Answer 1

a) 4x + 8 = 3x + 9 /// 4x - 3x = 9 - 8 /// x = 1;

b) 5x - 5 = 2x + 10 /// 5x - 2x = 10 + 5 /// 3x = 15 /// x = 5;

c) 3x + 6 = 4x + 16 /// 4x - 3x = 6 - 16 /// x = -10;

d) 2x + 4 + 3x + 12 = 3x + 18 /// 5x + 16 = 3x + 18 /// 5x - 3x = 18 - 16 /// 2x = 2 /// x = 1.