Question

Resolva as Equações:

A) x-x/2=1
B) x/3+x/2=15
C) 3x/2-5x=-7
D) x/2+x/4+x/2=4

Answer 1

A) x - x = 1 1 2 2× - 1× ( tudo dividido por 2 )= 1 /2 2×-1× =1, ×=1 B) ×/3+ ×/2 =15 2× + 3×( tudo dividido por 6) = 90/6 (Corta os 6 ) 2×+3× =90 5×=90 ×=90÷ 5 ×=18 C) 3x/2 -5x = -7 3× -10×( tudo sobre 2) =14/2 3x -10× =14 - 7× = 14 (-1 ) 7× = -14 × = -14 ÷ 7 × = -2 D) ×/2 +×/4 + ×/2 =4 2× + 4× + 2×( tudo sobre 4) =16/4 ( Corta os 4 ) 2x+ 4× +2× =16 8× =16 ×=16÷8 × = 2