Tìm x, biêt.
c. -12 + x = 5x – 20
d. 7x – 4 = 20 + 3x
e. 5x – 7 = – 21 – 2x
f. x + 15 = 7 – 6x
g. 17 – x = 7 – 6x
h. 3x + (-21) = 12 – 8x
k. 125 : (3x – 13) = 25
l. 541 + (218 – x) = 735
m. 3(2x + 1) – 19 = 14
n. 175 – 5(x + 3) = 85
o. 4x – 40 = |-4| + 12
Tìm x, biết.
a. 2(x – 5) – 3(x + 7) = 14
b. 5(x – 6) – 2(x + 3) = 12
c. 3(x – 4) – (8 – x) = 12
d. -7(3x – 5) + 2(7x – 14) = 28
e. 5(3 – 2x) + 5(x – 4) = 6 – 4x
f. -5(2 – x) + 4(x – 3) = 10x – 15
g. 2(4x – 8) – 7(3 + x) = |-4|(3 – 2)
h. 8(x – |-7|) – 6(x – 2) = |-8|.6 – 50
k. -7(5 – x) – 2(x – 10) = 15
l. 4(x – 1) – 3(x – 2) = -|-5|
m. -4(x + 1) + 89x – 3) = 24
n. 5(x – 30 – 2(x + 6) = 9
o. -3(x – 5) + 6(x + 2) = 9
p. 7(x – 9) – 5(6 – x) = – 6 + 11x
q. 10(x – 7) – 8(x + 5) = 6.(-5) + 24
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Sinh Học lớp 12
