2(x + 7) + x = 20 how to solve and what's the answer?

2(x + 7) + x = 20

Distribute 2 inside the parentheses.

2x + 14 + x = 20

Combine like terms.

3x + 14 = 20

Subtract 14 from both sides.

3x = 6

Divide both sides by 3.

part a

x     y

0     8

1     7.5

2     7

3     6.5

4     6

5     5.5  

for every hour i deducted .5 inches from the length of the candle

part b

it is a function because for every x value there is only one y value

part   c

for every x value there is only one y value

x       y

0       8

1       7.6

2       7.2

3       6.8

step-by-step explanation: