7º ano Equações

 1 – Resolva as equações de 1º grau.

• a) 5 x + 6 = – 4
• b) 3 x + 26 = – 1
• c) 4 x – 8 – 2 x = x – 2
• d) 10 x – 8 – 2 = 7 x – 4
• e) 2 x + 5 – 5 x = – 1
• f) 4 x – 4 – 5 x = – 6 + 90
• g) – 3 x + 10 = 2 x + 8 + 1
• h) 3 x – 4 = 11
• i) 4 x + 6 = 12 – 2 x
• j) x – 10 – 8 = 2 x + 4
• k) 5 x + 4 x – 10 = 2 x – 2
• l) 10 – 9 x + 2 x = 2 – 3 x
• m) x + 2 x – 1 – 3 = x
• n) – 10 + 4 – 2 x = – 4 x – 7
• o) 2 – 4 x = 32 – 18 x + 12
• p) 2 x + 3 = 9
• q) 3 x + 7 = x + 3
• r) – 7 x + 4 + 10 x = 4 – 2 x
• s) 5 + 6 x = 5 x + 2
• t) 2 – 3 x = – 2 x + 12 – 3 x
• u) 7 x – 4 – x = – 2 x + 8 – 3 x
• v) 2 ( x + 1 ) – ( x – 1 ) = 0
• w) 13 + 4 ( 2 x – 1 ) = 5 ( x + 2 ) 
• x/2 + 1-x / 5 = 1 / 2
• 3x - 6 / 2 = 5x - 9 / 3
• x + 3 / 2 + x + 2 / 3 = - 1/ 2
• 1 + x / 6 + 2 - x / 3 - 1 / 2 = 0