How to calculate x + (x-3) + (X-5) = 37

How to calculate x + (x-3) + (X-5) = 37

x+x-3+x-5=37
3x=37+8
3x = 45 divided by 3
X=15

Solution equation: x + 45 − x + 5 = x + 33 − x − 22

Remove denominator: 6 (x + 4) - 30x + 150 = 10 (x + 3) - 15 (X-2) remove bracket: 6x + 24-30x + 150 = 10x + 30-15x + 30 transfer, merge: - 19x = - 114, change coefficient to 1: x = 6

Solve the equation 15% x + 20% x = 10.5 3x-40% x = 13 60% + x = 3 x + 120% = 44

15%x+20%x=10.5
0.15x+0.2x=10.5
0.35x=10.5
x=10.5÷0.35
x=30
3x-40%x=13
3x-0.4x=13
2.6x=13
x=13÷2.6
x=5
60%+x=3
x=3-0.6
x=2.4
x+120%=44
x=44-1.2
x=42.8

Given that the elements in the set {(x, y)} {2x-y = 5x + 2Y = 5} are (m, n), we can find the solution set of the equation x ^ 2 + 2nx-m = 0

2x-y=5
x+2y=5 x=3 y=1
That is, M = 3, n = 1
The equation x ^ 2 + 2nx-m = 0 becomes
x^2+2x-3=0
(x-1)(x+3)=0
X = 1 or x = - 3

10 and 3 / 7-5.89 + 4 / 7-3.11 can be easily calculated
RT
There are many topics, but only one is not. If the topic is difficult, you will ask for help,

10 and 3 / 7-5.89 + 4 / 7-3.11
=(10 and 3 / 7 + 4 / 7) - (5.89 + 3.11)
=11 - 9
=2

Given that line L: kx-y + 6 = 0 is cut by circle x ^ 2 + y ^ 2 = 25 and chord length is 8, find the value of K

Radius r = 5
Chord length m = 8
So chord center distance = √ [R & # 178; - (M / 2) &# 178;] = 3
That is, the distance from (0,0) to L is 3
|0-0+6|/√(k²+1)=3
k²+1=4
k=±√3

Four out of nineteen times sixteen out of thirteen minus sixteen out of nineteen times two out of thirteen

The result is 16 out of 19 times 2 out of 13
By direct general division, we get (16 × 4-16 × 2) / (19 × 13) = 32 / (19 × 13) = 32 / 247

The parabola y = 2x square-4x-1 moves down one unit, and the analytic formula is how to transform y = 2x square-4x-1 into y = a (x + m) square plus K-

The parabola y = 2x square-4x-1 moves down one unit, and the analytical formula is
y+1=2x²-4x-1
y=2x²-4x-2
y=2x²-4x-1
=2(x²-2x+1)-3
=2(x-1)²-3

The four numbers in the following () group cannot be proportional
A. 3, 8, 6 and 4B. 4, 7, 8 and 24C. 1.6, 6.4, 3 and 12

A. Because 3 × 8 = 4 × 6, so 4:8 = 3:6; B, because the product of any two numbers is not equal to the product of the other two numbers, so the four numbers are out of proportion; C, because 1.6 × 12 = 6.4 × 3, so 1.6:6.4 = 3:12; so choose B

|The geometric meaning of x-3 | is the distance between the point of X and the number 3 on the number axis. What does the formula | x + 1 | mean

The distance between the point representing X and the number - 1 on the number axis