數學科難題

Let the smaller number be y,
then the bigger number should be y+2.

y + (y +2) = 46
2y + 2 = 46
2y = 44
y=22

y + 2
=22 + 2
=24

That is the smaller number is 22 and the bigger number is 24.

Checking:
22 + 24
=46

So the answers are correct.

we let x be the smallest number

x+x+2 =46

2x+2=46

x=22


so the two numbers are 22 and 24

Method 1
Let the smaller number be y,
then the greater number is (y+2)
y+(y+2)=46
y+y+2=46
2y+2=46
2y=44
y=22
Therefore the smaller number is 22, then the greater number is 22+2=24
Method 2
Let the greater number be y,
then the smaller number is (y-2)
y+(y-2)=46
y+y-2=46
2y-2=46
2y=48
y=24
Therefore the greater number is 24, then the smaller number is 24-2=22
Method 3
Let the smaller number be x and the greater number be y
y=x+2.....(1)
x+y=46.....(2)
Sub (1) into (2)
x+2+x=46
2x+2=46
2x=44
x=22
Therefore the smaller number is 22, then the greater number is 22+2=24


Check:
22 and 24 are 2 consecutive even numbers.
22+24=46
Therefore the answer is right.

Let 2n be the smaller consecutive even number, then 2n+2 be the larger consecutive even number,

2n + ( 2n + 2 ) = 46
4n + 2 = 46
4n = 44
n = 11

So the smaller consecutive even number is 22, the larger one is 24.

(X)+(X+2)=46
2x=44
x=22


numbers are 22,24

設兩個數中, 最小的為 z

z + z+2 = 46
2z+2 = 46
2z+2-2 = 46-2-----(兩邊各減2)
2z/2 = 44/2--------(兩邊各除2)
z = 22

兩數分別為 22, 24.

let the numbers be x and x+2
x+x+2=46
2x+2=46
2x=44
x=22

So that the numbers are 22 and (22+2) =24.

let x be the first number , then x+2 be the second one ~

x+(x+2) =46
2x+2=46
2x=44
x=22

therefore , these two numbers are 22 and 24

Let X is the first number, then ( X + 2 ) is the second number

X + X + 2 = 46
2X = 46 - 2
2X = 44
X = 22

The two numbers are 22 and 24

Let N be the number.

N + (N + 2) = 46
-> 2N + 2 = 46
-> 2N = 44
-> N = 22

So the two numbers are 22 AND 24

let the first even number be a, then the second one is (a+2)

46 = a + (a + 2)
2a + 2 = 46
2a = 44
a=22

so the 2 numbers are 22 and 24