Bài 1 . Tìm x
a, 5-(10-x)=7 e, 11 + (15-x) >1
b,-32-(x-5)=0 f, 15 - x = -(-7)
c, x + (-5) = -(-7) g,2(4x + 1 ) - 1 = 17
d,(-34) - x = -(-45) h, -12 + (x - 9) <0
Bài 2 Tìm x
a, x(x + 2 ) = 0 e, 7x - 13 = 3².4
b, 5 - 2x = -7 f, 155 - 5 (x=3) = 80
c, (x + 3)( x - 4 ) = 0 g, 119 + 3³.x = 2³.5²
d, -32 - 4( x - 5 ) = 0 h, 3(2x + 1) - 19 = 14