Bài toán 12: Tìm x Z biết.
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 toán 13: Tìm x Z biết.
a) 5 – (12 – x) = 129 – (6 + 129)
g) 30 – 3(x – 2) = 18
b) 20 – (x + 3) = - 45 – (17 – 45)
h) 5(x – 6) – 2(x + 3) = 12
c) 24 + (17 – x) = (125 – 30) – 125
k) 3(x – 4) – (8 – x) = 12
d) x – (13 – x) = - 24 + (-7 + x)
l) 4(x – 5) – 3(x + 7) = -19
e) (x – 7) + (5 – x) = 12 – (-8 + x)
k) 7(x – 3) – 5(3 – x) = 11x - 5
f) 124 + (13 – 16) = 162 – (x + 162)
l) 7(x – 9) – 5(6 – x) = -6 + 11x
Bài toán 14: Tìm x Z biết
a) |x + 1| - 16 = -3
d) (x + 3) x
b) 12 - |x – 9| = -1
e) (x + 7) (x + 5)
c) |x + 1| + 12 = 5
f) (x + 6) (x + 2)
Giúp mình nha mình đang cần gấp :(