Ta có : x-3=-6
Suy ra : x=-6+3
x=-(6-3)
x=-3
Vậy x bằng -3
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Bài toán 3 : Tìm x, biết.a. 2(x – 5) – 3(x + 7) 14 b. 5(x – 6) – 2(x + 3) 12c. 3(x – 4) – (8 – x) 12 d. -7(3x – 5) + 2(7x – 14) 28e. 5(3 – 2x) + 5(x – 4) 6 – 4x f. -5(2 – x) + 4(x – 3) 10x – 15g. 2(4x – 8) – 7(3 + x) |-4|(3 – 2) h. 8(x – |-7|) – 6(x – 2) |-8|.6 – 50k. -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) 9o. -3(x – 5) + 6(x + 2) 9 p. 7(x – 9) – 5(6 – x) – 6 + 11xq. 10(x – 7) – 8(x + 5) 6.(-5) + 24
Đọc tiếp
Bài toán 3 : 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
Tìm x
2.(x-5)-3(x+6)+=4(x-7)3(x-1)-2(x+5)=2(x-3)5(1-x)-6(1+x)=7(3-x)2x+5-3(3x+7)=6(1-x)+8x-2+3(x-4)=5(x-6)+7x+2+3(1-x)-5(2-x)=6(1-x)+(3-x)
Tính
18/45 - 4/12 - 6/9 - 21/35
4/3 + 3/5 + 7/3 + 2/5 + 1/3
7/25 x 39/14 x 50/78
1/3 x 4/5 x 1/3 x 6/5
6/7 x 8/13 + 6/7 x 9/13 - 3/13 x 6/7
Bài 1: Tìm x :A) 3/4.(x-2) - 1/2.(6-2.x)= 1/6.x + 5
B) -1/2.(3.x + 5) - 2/3.(9-6.x) = 3/5.(x-10) - 3
C) (1/4.x - 1,5) + (5/6.x - 3) - (5/8.x -0,5) = -4,5
Tính:
A = 6^3 x 24^2 + 6^3 x 27^2/ 3^4 x 8^3 + 8^2 x 6
a,x - 1/2 - (-1/6)
b,x + 5/6 = 3/8
c,2/3 . x -1/2 = 5/6
d, x/7 = 6/-21
e,(7/3 x -0,6) : 3^2/5 = 1
f,x/45 = 5/6 + -29/30
g,(4,5 - 2x) . (-1^4/7) =11/14
h,-2/7 + 4/7x=5/7
1 Tìm x:
a) 5.(1-x)-6.(1+x)=7.(3-x)
b) 2.(x+5)-3.(3x+7)=6.(1-x)+8x
c) x-2+3.(x-4)=5.(x-6)+7
d) x+2+3.(1-x)-5.(2-x)=6.(1-x)+7.(3x)
1) 2⁴ .x -3.5x = 5² - 2⁴ 2) 3² .x +2²x =26.2² -13
5) 6² x -5²x = 11.2 -11. 3) 5² .x - 2⁴ x = 3⁴ -16.3²
6) 7² x - 6² x =13.2³ - 26. 4) 7² .x - 14 x = 7² .10 -70
Giúp mình với vì tối nay mình phải đi học rồi
G=3/(3 x 6 x 9) + 3/(6 x 9 x 12) + 3/(9 x 12 x 15) + 3/(12 x 15 x 18)
/x-6/=x-6
/7-x/=x-7
5x+6-/x+3/+3=13 voi x>= -3
/x-1/=-[x+4] mu 2