HELP ME PLZ ANSER ALL 50 POINTS​

289

Step-by-step explanation:

i think

anyways hope this helps

Step-by-step explanation:

Commutative means a + b = b + a

So, 4x + 3 = 3 + x

Associative means a + (b + c) = (a + b) + c

So, 6 + (9 + 7) = (6 + 9) + 7

Distributive means expand the bracket a * (b + c) = a*b + a*c

So, (4x + 3y + 2z) * 7 = 4x*7 + 3y*7 + 2z*7

Commutative is a + b = b + a

So, 15a + 15b = 15b + 15a

entering that problem on the tube might get you an answer

step by step resolutions

1) n+n+1+n+2=51

3n+3=51

3n=48

n=16

the three numbers are 16, 17 and 18.

2) x+15=4x

3x=15

x=5

radha is now 5 years old

3) the two digits are x and y.

y=3x

(10x+y)+(10y+x)=88

y=3x

11x+11y=88

y=3x

x+y=8

x+3x=8

x=2

the original number can be either 28 or 82.

4) n+(n+2)+(n+4)=48

3n+6=48

3n=42

n=14

the numbers are 14, 16 and 18.

5) y=x+3

10y+x+10x+y=143

y=x+3

11x+11y=143

y=x+3

x+y=13

x+x+3=13

2x=10

x=5

the original number can be 57 or 75.

hope this !