Question

What’s the answer to this ???

Answer 1

3) 3x+10 = 5x+20

=> 3x-5x= 20-10

=> -2x= 10

=> x = 10/-2

=> x= -5

4) 2(b+6) = 18

=> 2b +12 = 18

=> 2b = 18-12

=> b= 6/2

=> b = 3

Answer 2

-5, 3

Explanation:

3) 10+3n=20+5n Set up the problem

-3n -3n Subtract 3n from both sides to get n on one side of the equation.

10 =20-2n

-20 -20 Subtract 20 from both sides to isolate n

-10 =2n

/2 /2 Divide both sides by 2 to isolate n

-5 = n

4) 18=2(b+6) Write down problem

18=2b+12 Distribute

-12 -12 Subtract 12 from both sides to isolate b

6=2b

/2/2 Divide both sides by 2 to isolate b

3=b