\(7\times\left(x-6\right)=4x+9\)
\(7x-42=4x+9\)
\(7x-4x=9+42\)
\(3x=51\)
\(x=17\)
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Tìm x, biết:
a) 1/4 x + 7/4 x = -6
b) 1/4x + 2x = 9/2
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
1) 5x - 16 = 40 + x
2) 4x - 10 = 15 - x
3) 3x - 6 = 5x + 2
4) 15 - x = 4x - 5
5) x - 15 = 6 + 4x
6) -12 + x = 5x - 20
7) 7x - 4 = 20 + 3x
8) 5x - 7 = -21 - 2x
9) x + 15 = 20 - 4x
10) 17 - x = 7 - 6x
7.( x-6 )= 4x +9 lưu ý là dấu x là tìm x nhé, ko phải dấu nhân đâu, cảm ơn mn
Tìm x biết
1. x + 9 chia hết cho x + 7
2. x + 10 chia hết cho x + 1
3 . x - 15 chia hết cho x + 2
4. x + 20 chia hết cho x + 2
5 . 4x + 3 chia hết cho x - 2
6 . 3x + 9 chia hết cho x + 2
7 . 3x + 16 chia hết cho x + 1
8 . 4x + 69 chia hết cho x + 5
Bài 4: Tìm các số nguyên x biết
1) |x + 2| = 4
2) 3 – |2x + 1| = (-5)
3) 12 + |3 – x| = 9
4) |x + 9| = 12 + (-9) + 2
5) 2(4x – 8) – 7(3 + x) = |-4|(3 – 2)
6) 8(x – |-7|) – 6(x – 2) = |-8|.6 – 50
7) -7(5 – x) – 2(x – 10) = 15
8) 4(x – 1) – 3(x – 2) = -|-5|
Tìm x bt
a) x-3/7:9/14= -7/6
b) 3/4+1/4.x=5/8
c) |4x-1 |-1/2=3
d) 25%.x+x= -1,25
Bài 6 . Tìm x biết: 1) 58 + 7x 100 AI LM ĐC MÌNH CHO 20 XU 2) 101 +(36 – 4x) 105 3) 3x – 7 28 4) ( x – 12):12125) x – 56 : 4 166) (3.x-2 4 ).732.747) 71 – (33 + x) 26 8) 7 10) 4(x + 41) 400 9) 45 – (x + 9):2 611) 2. (x + 7) – 25 1313) 2(x- 51) 2.23 + 2015) 450 : (x – 19) 5017) 10 - (x – 3): 2 72 – 1 1019) 2x + 2 – 2 x 488) 140 : (x – 12) 5(x – 9) 35014) 2x – 49 5.3216) 200 – (2x + 6) 4318) 135 – 5.(x + 4) 3520) (3x – 5)3 – 1 26
Đọc tiếp
Bài 6 . Tìm x biết: 1) 58 + 7x = 100 AI LM ĐC MÌNH CHO 20 XU
2) 101 +(36 – 4x) =105
3) 3x – 7 = 28
4) ( x – 12):12=12
5) x – 56 : 4= 16
6) (3.x-2 4 ).73=2.74
7) 71 – (33 + x) = 26
8) = 7 10) 4(x + 41) = 400
9) 45 – (x + 9):2 = 6
11) 2. (x + 7) – 25 = 13
13) 2(x- 51) = 2.23 + 20
15) 450 : (x – 19) = 50
17) 10 - (x – 3): 2 = 72 – 1 10
19) 2x + 2 – 2 x = 48
8) 140 : (x – 12) 5(x – 9) = 350
14) 2x – 49 = 5.32
16) 200 – (2x + 6) = 43
18) 135 – 5.(x + 4) = 35
20) (3x – 5)3 – 1 = 26
Tìm x:
(x-27):8=30
7.(x-6)=4x+9